Optical lens system, image capturing unit and electronic device comprising nine lenses of various refractive powers, or ten lenses of -+--+-+-+- or ++--+-+-+- refractive powers

ABSTRACT

An optical lens system includes nine lens elements which are, in order from an object side to an image side: a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element, an eighth lens element and a ninth lens element. At least one lens surface of the seventh lens element, the eighth lens element and the ninth lens element has at least one critical point in an off-axis region thereof, and each of the seventh lens element, the eighth lens element and the ninth lens element has at least one lens surface being aspheric.

RELATED APPLICATIONS

This application claims priority to Taiwan Application 108120723, filedon Jun. 14, 2019, which is incorporated by reference herein in itsentirety.

BACKGROUND Technical Field

The present disclosure relates to an optical lens system, an imagecapturing unit and an electronic device, more particularly to an opticallens system and an image capturing unit applicable to an electronicdevice.

Description of Related Art

With the development of semiconductor manufacturing technology, theperformance of image sensors has been improved, and the pixel sizethereof has been scaled down. Therefore, featuring high image qualitybecomes one of the indispensable features of an optical system nowadays.

Furthermore, due to the rapid changes in technology, electronic devicesequipped with optical systems are trending towards multi-functionalityfor various applications, and therefore the functionality requirementsfor the optical systems have been increasing. However, it is difficultfor a conventional optical system to obtain a balance among therequirements such as high image quality, low sensitivity, a properaperture size, miniaturization and a desirable field of view.

SUMMARY

According to one aspect of the present disclosure, an optical lenssystem includes nine lens elements. The nine lens elements are, in orderfrom an object side to an image side, a first lens element, a secondlens element, a third lens element, a fourth lens element, a fifth lenselement, a sixth lens element, a seventh lens element, an eighth lenselement and a ninth lens element.

At least one lens surface of the seventh lens element, the eighth lenselement and the ninth lens element has at least one critical point in anoff-axis region thereof. Each of the seventh lens element, the eighthlens element and the ninth lens element has at least one lens surfacebeing aspheric.

When an axial distance between an object-side surface of the first lenselement and an image surface is TL, a maximum image height of theoptical lens system is ImgH, an entrance pupil diameter of the opticallens system is EPD, and a minimum value among Abbe numbers of all lenselements of the optical lens system is Vmin, the following conditionsare satisfied:TL/ImgH<3.0;TL/EPD<4.0; andVmin<28.

According to another aspect of the present disclosure, an imagecapturing unit includes the aforementioned optical lens system and animage sensor, wherein the image sensor is disposed on the image surfaceof the optical lens system.

According to another aspect of the present disclosure, an electronicdevice includes at least two image capturing units which face in thesame direction. The at least two image capturing units include a firstimage capturing unit and a second image capturing unit. The first imagecapturing unit is the aforementioned image capturing unit. The maximumfield of view of the first image capturing unit is different from themaximum field of view of the second image capturing unit by at least 20degrees.

According to another aspect of the present disclosure, an optical lenssystem includes, in order from an object side to an image side, a frontlens group, a middle lens group and a rear lens group. The front lensgroup includes an object-side lens element closest to an imaged object.The rear lens group includes at least three lens elements.

At least one lens surface of the rear lens group has at least onecritical point in an off-axis region thereof. Each lens element of therear lens group has at least one lens surface being aspheric.

When the total number of lens elements of the optical lens system is NL,an axial distance between an object-side surface of the object-side lenselement and an image surface is TL, a maximum image height of theoptical lens system is ImgH, an entrance pupil diameter of the opticallens system is EPD, and a minimum value among Abbe numbers of all lenselements of the optical lens system is Vmin, the following conditionsare satisfied:9≤NL≤10;TL/ImgH<3.0;TL/EPD<4.0; andVmin<28.

According to another aspect of the present disclosure, an imagecapturing unit includes the aforementioned optical lens system and animage sensor, wherein the image sensor is disposed on the image surfaceof the optical lens system.

According to another aspect of the present disclosure, an electronicdevice includes the aforementioned image capturing unit.

According to one aspect of the present disclosure, an optical lenssystem includes nine lens elements. The nine lens elements are, in orderfrom an object side to an image side, a first lens element, a secondlens element, a third lens element, a fourth lens element, a fifth lenselement, a sixth lens element, a seventh lens element, an eighth lenselement and a ninth lens element.

At least one lens surface of the seventh lens element, the eighth lenselement and the ninth lens element has at least one critical point in anoff-axis region thereof. Each of the seventh lens element, the eighthlens element and the ninth lens element has at least one lens surfacebeing aspheric. At least five lens elements of the optical lens systemare made of plastic material.

When an axial distance between an object-side surface of the first lenselement and an image surface is TL, a maximum image height of theoptical lens system is ImgH, and an entrance pupil diameter of theoptical lens system is EPD, the following conditions are satisfied:TL/ImgH<3.0; andTL/EPD<4.0.

According to one aspect of the present disclosure, an optical lenssystem includes ten lens elements. The ten lens elements are, in orderfrom an object side to an image side, a first lens element, a secondlens element, a third lens element, a fourth lens element, a fifth lenselement, a sixth lens element, a seventh lens element, an eighth lenselement, a ninth lens element and a tenth lens element.

At least one lens surface of the eighth lens element, the ninth lenselement and tenth lens element has at least one critical point in anoff-axis region thereof. Each of the eighth lens element, the ninth lenselement and tenth lens element has at least one lens surface beingaspheric. At least five lens elements of the optical lens system aremade of plastic material.

When an axial distance between an object-side surface of the first lenselement and an image surface is TL, a maximum image height of theoptical lens system is ImgH, an entrance pupil diameter of the opticallens system is EPD, and a minimum value among Abbe numbers of all lenselements of the optical lens system is Vmin, the following conditionsare satisfied:TL/ImgH<3.0;TL/EPD<4.0; andVmin<28.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure can be better understood by reading the followingdetailed description of the embodiments, with reference made to theaccompanying drawings as follows:

FIG. 1 is a schematic view of an image capturing unit according to the1st embodiment of the present disclosure;

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 1stembodiment;

FIG. 3 is a schematic view of an image capturing unit according to the2nd embodiment of the present disclosure;

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 2ndembodiment;

FIG. 5 is a schematic view of an image capturing unit according to the3rd embodiment of the present disclosure;

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 3rdembodiment;

FIG. 7 is a schematic view of an image capturing unit according to the4th embodiment of the present disclosure;

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 4thembodiment;

FIG. 9 is a schematic view of an image capturing unit according to the5th embodiment of the present disclosure;

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 5thembodiment;

FIG. 11 is a schematic view of an image capturing unit according to the6th embodiment of the present disclosure;

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 6thembodiment;

FIG. 13 is a schematic view of an image capturing unit according to the7th embodiment of the present disclosure;

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 7thembodiment;

FIG. 15 is a schematic view of an image capturing unit according to the8th embodiment of the present disclosure;

FIG. 16 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 8thembodiment;

FIG. 17 is a schematic view of an image capturing unit according to the9th embodiment of the present disclosure;

FIG. 18 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 9thembodiment;

FIG. 19 is a schematic view of an image capturing unit according to the10th embodiment of the present disclosure;

FIG. 20 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 10thembodiment;

FIG. 21 is a schematic view of an image capturing unit according to the11th embodiment of the present disclosure;

FIG. 22 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing unit according to the 11thembodiment;

FIG. 23 is a perspective view of an image capturing unit according tothe 12th embodiment of the present disclosure;

FIG. 24 is a front view of an electronic device according to the 13thembodiment of the present disclosure;

FIG. 25 is a rear view of an electronic device according to the 14thembodiment of the present disclosure;

FIG. 26 is a rear view of an electronic device according to the 15thembodiment of the present disclosure;

FIG. 27 shows a schematic view of Y11, Y92, Yc11, Yc82 and Yc92, as wellas several inflection points and critical points according to the 7thembodiment of the present disclosure;

FIG. 28 shows a schematic view of Y11, Y102, Yc82, Yc92 and Yc102, aswell as several inflection points and critical points according to the4th embodiment of the present disclosure; and

FIG. 29 shows a schematic view of CRA according to the 1st embodiment ofthe present disclosure.

DETAILED DESCRIPTION

An optical lens system can include, in order from an object side to animage side, a front lens group, a middle lens group and a rear lensgroup, and the optical lens system includes nine or ten lens elements.Moreover, the rear lens group can include at least three lens elements.In the case of the optical lens system including nine lens elements, thenine lens elements are, in order from the object side to the image side,a first lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element, a sixth lens element, aseventh lens element, an eighth lens element and a ninth lens element.In the case of the optical lens system including ten lens elements, theten lens elements are, in order from the object side to the image side,a first lens element, a second lens element, a third lens element, afourth lens element, a fifth lens element, a sixth lens element, aseventh lens element, an eighth lens element, a ninth lens element and atenth lens element. In one aspect of the present disclosure, the frontlens group can have a total of three lens elements, and the rear lensgroup can have a total of three lens elements; namely, in the case ofthe optical lens system including nine lens elements, the front lensgroup can include, in order from the object side to the image side, thefirst lens element, the second lens element and the third lens element,and the rear lens group can include, in order from the object side tothe image side, the seventh lens element, the eighth lens element andthe ninth lens element; in the case of the optical lens system includingten lens elements, the front lens group can include, in order from theobject side to the image side, the first lens element, the second lenselement and the third lens element, and the rear lens group can include,in order from the object side to the image side, the eighth lenselement, the ninth lens element and the tenth lens element.

Hereinafter, among all lens elements of the optical lens system, thelens element closest to an imaged object is defined as an object-sidelens element, and the lens element closest to an image surface isdefined as an image-side lens element. For example, in the case of theoptical lens system including nine lens elements, the first lenselement, closest to the imaged object, is the object-side lens element,and the ninth lens element, closest to the image surface, is theimage-side lens element; in the case of the optical lens systemincluding ten lens elements, the first lens element, closest to theimaged object, is the object-side lens element, and the tenth lenselement, closest to the image surface, is the image-side lens element.

The first lens element can have an object-side surface being concave ina paraxial region thereof, and the object-side surface of the first lenselement can have at least one convex critical point in an off-axisregion thereof. Therefore, it is favorable for reducing the effectiveradius of the first lens element in a wide field of view configurationso as to effectively miniaturize the optical lens system, therebybecoming applicable to electronic devices with limited accommodationspace. Please refer to FIG. 27, which shows a schematic view of a convexcritical point C of the object-side surface 711 of the first lenselement 710 according to the 7th embodiment of the present disclosure.

At least one lens surface of the rear lens group of the optical lenssystem has at least one critical point in an off-axis region thereof,and each lens element of the rear lens group has at least one lenssurface being aspheric. For example, in the case of the optical lenssystem including nine lens elements and the rear lens group having atotal of three lens elements, at least one lens surface of the seventhlens element, the eighth lens element and the ninth lens element has atleast one critical point in an off-axis region thereof, and each of theseventh lens element, the eighth lens element and the ninth lens elementhas at least one lens surface being aspheric; in the case of the opticallens system including ten lens elements and the rear lens group having atotal of three lens elements, at least one lens surface of the eighthlens element, the ninth lens element and the tenth lens element has atleast one critical point in an off-axis region thereof, and each of theeighth lens element, the ninth lens element and the tenth lens elementhas at least one lens surface being aspheric. Therefore, it is favorablefor providing better imaging capability with a suitable image sensor inaspects such as pixel size, resolution or chief ray angle. It is alsofavorable for providing sufficient design flexibility on the shapevariation of the lens elements so as to meet requirements such ascontrolling the size of a lens. Moreover, at least one lens surface ofthe rear lens group of the optical lens system can have at least onecritical point in an off-axis region thereof. Please refer to FIG. 27and FIG. 28, FIG. 27 shows a schematic view of critical points C of theobject-side surface 781 of the eighth lens element 780, the image-sidesurface 782 of the eighth lens element 780 and the image-side surface792 of the ninth lens element 790 according to the 7th embodiment of thepresent disclosure, and FIG. 28 shows a schematic view of criticalpoints C of the object-side surface 481 of the eighth lens element 480,the image-side surface 482 of the eighth lens element 480, theobject-side 491 of the ninth lens element 490, the image-side surface492 of the ninth lens element 490 and the image-side surface 495 of thetenth lens element 493 according to the 4th embodiment of the presentdisclosure. The aforementioned critical points according to theembodiments of the present disclosure in FIG. 27 and FIG. 28 are onlyexemplary. The other lens surfaces of the lens elements may also haveone or more critical points.

In the optical lens system of the present disclosure, at least five lenselements can be made of plastic material. Therefore, it is favorable forincreasing the shape variation of lens elements so as to reduce the sizeand weight of the optical lens system and correct aberrations, thusimproving mass production and reducing manufacturing costs.

When an axial distance between the object-side surface of the first lenselement and the image surface is TL, and a maximum image height of theoptical lens system (half of a diagonal length of an effectivephotosensitive area of an image sensor) is ImgH, the following conditionis satisfied: TL/ImgH<3.0. Therefore, it is favorable for balancing theminiaturization of the optical lens system and manufacturability of alens module. Moreover, the following condition can also be satisfied:TL/ImgH<2.50. Moreover, the following condition can also be satisfied:TL/ImgH<1.60.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and an entrance pupil diameterof the optical lens system is EPD, the following condition is satisfied:TL/EPD<4.0. Therefore, it is favorable for featuring a large aperture ofthe optical lens system. Moreover, the following condition can also besatisfied: TL/EPD<3.0.

When a minimum value among Abbe numbers of all lens elements of theoptical lens system is Vmin, the following condition can be satisfied:Vmin<28. Therefore, it is favorable for better correcting chromaticaberration. Moreover, the following condition can also be satisfied:Vmin<24. Moreover, the following condition can also be satisfied:Vmin<20.

When the total number of lens elements of the optical lens system is NL,the following condition can be satisfied: 9≤NL≤10. Therefore, it isfavorable for providing better imaging capability with the suitablesensor in aspects such as pixel size, resolution or chief ray angle. Itis also favorable for providing sufficient design flexibility on thelens elements so as to meet requirements such as controlling the size ofa lens. Moreover, the following condition can also be satisfied: NL=10.

When a focal length of the optical lens system is f, and a compositefocal length of the front lens group is fG1, the following condition canbe satisfied: 0.25<fG1/f<8.0. Therefore, it is favorable for effectivelyensuring sufficient positive refractive power on the object side of theoptical lens system so as to further reduce the total track length ofthe optical lens system. Moreover, when the focal length of the opticallens system is f, and a composite focal length of the first lenselement, the second lens element and the third lens element is f123, thefollowing condition can be satisfied: 0.25<f123/f<8.0. Moreover, thefollowing condition can also be satisfied: 0.30<f123/f<4.0. Moreover,the following condition can also be satisfied: 0.35<f123/f<4.0. It isnoted that, in the case of the front lens group having a total of threelens elements, fG1 is f123.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and the focal length of theoptical lens system is f, the following condition can be satisfied:TL/f<3.0. Therefore, it is favorable for effectively increasingflexibility in the size configuration of the optical lens system,thereby becoming more applicable regarding many requirements. Moreover,the following condition can also be satisfied: 0.70<TL/f<1.0. Moreover,the following condition can also be satisfied: 0.80<TL/f<2.0. Moreover,the following condition can also be satisfied: 1.45<TL/f<2.0. Moreover,the following condition can also be satisfied: 1.10<TL/f<1.35.

When the composite focal length of the first lens element, the secondlens element and the third lens element is f123, and a composite focallength of the fourth lens element, the fifth lens element and the sixthlens element is f456, the following condition can be satisfied:−2.50<f123/f456. Therefore, it is favorable for balancing the refractivepower of the middle lens group and the front lens group so as to allowbetter light convergence or correct aberrations. Moreover, the followingcondition can also be satisfied: −1.25<f123/f456. Moreover, thefollowing condition can also be satisfied: −2.0<f123/f456<−1.0.Moreover, the following condition can also be satisfied:−0.50<f123/f456<1.25.

When an axial distance between the object-side surface of the first lenselement and an image-side surface of the image-side lens element is Td,and a sum of central thicknesses of all lens elements of the opticallens system is ΣCT, the following condition can be satisfied:Td/ΣCT<2.0. Therefore, it is favorable for preventing axial distancesbetween each of all adjacent lens elements from being overly large orsmall so as to improve space utilization efficiency of the lenselements. Moreover, the following condition can also be satisfied:Td/ΣCT<1.75. Moreover, the following condition can also be satisfied:1.20<Td/ΣCT<1.70. Depending on the total number of lens elements in theoptical lens system, Td can be an axial distance between the object-sidesurface of the first lens element and the image-side surface of theninth or tenth lens element.

When a vertical distance between the critical point on the object-sidesurface of the first lens element and an optical axis is Yc11, and amaximum effective radius of the object-side surface of the first lenselement is Y11, the following condition can be satisfied: Yc11/Y11<0.75.Therefore, it is favorable for reducing the effective radius of thefirst lens element in a wide field of view configuration so as toeffectively miniaturize the optical lens system, thereby becomingapplicable to electronic devices with limited accommodation space.Moreover, the following condition can also be satisfied:0.05<Yc11/Y11<0.60. Please refer to FIG. 27, which shows a schematicview of Y11 and Yc11 according to the 7th embodiment of the presentdisclosure.

When a maximum field of view of the optical lens system is FOV, thefollowing condition can be satisfied: 100 [deg.]<FOV<150 [deg.].Therefore, it is favorable for featuring a wide field of view of theoptical lens system.

According to the present disclosure, the optical lens system furtherincludes an aperture stop, and the aperture stop can be disposed betweenthe imaged object and the fourth lens element. Therefore, it isfavorable for reducing the size of the optical lens system and adjustingthe field of view so as to meet various requirements. Moreover, theaperture stop can also be disposed between the imaged object and thethird lens element. Moreover, the aperture stop can also be disposedbetween the imaged object and the second lens element. Moreover, theaperture stop can also be disposed between the imaged object and thefirst lens element.

When an axial distance between the aperture stop and the image-sidesurface of the image-side lens element is Sd, and the axial distancebetween the object-side surface of the first lens element and theimage-side surface of the image-side lens element is Td, the followingcondition can be satisfied: 0.60<Sd/Td<1.20. Therefore, it is favorablefor positioning the aperture stop so as to better configure the aperturesize, field of view and size distribution of the optical lens system.Moreover, the following condition can also be satisfied: 0.75<Sd/Td<1.0.Depending on the total number of lens elements in the optical lenssystem, Sd can be an axial distance between the aperture stop and theimage-side surface of the ninth or tenth lens element, and Td can be theaxial distance between the object-side surface of the first lens elementand the image-side surface of the ninth or tenth lens element.

When an f-number of the optical lens system is Fno, the followingcondition can be satisfied: 1.0<Fno<2.20. Therefore, it is favorable forfeaturing a large aperture of the optical lens system. Moreover, thefollowing condition can also be satisfied: 1.0<Fno<2.10. Moreover, thefollowing condition can also be satisfied: 1.20<Fno<2.10.

When the total number of lens elements having an Abbe number smallerthan 40 in the optical lens system is V40, the following condition canbe satisfied: 4≤V40. Therefore, it is favorable for correcting chromaticaberration.

When the total number of lens elements having an Abbe number smallerthan 30 in the optical lens system is V30, the following condition canbe satisfied: 4≤V30. Therefore, it is favorable for further correctingchromatic aberration.

When the total number of lens elements having an Abbe number smallerthan 20 in the optical lens system is V20, the following condition canbe satisfied: 2≤V20. Therefore, it is favorable for further correctingchromatic aberration.

When an Abbe number of a lens element of the optical lens system is V,and a refractive index of the lens element of the optical lens system isN, at least one lens element of the optical lens system can satisfy thefollowing condition: 6.0<V/N<12.0. Therefore, it is favorable for bettercorrecting chromatic aberration. For example, when an Abbe number of thefirst lens element is V1, an Abbe number of the second lens element isV2, an Abbe number of the third lens element is V3, an Abbe number ofthe fourth lens element is V4, an Abbe number of the fifth lens elementis V5, an Abbe number of the sixth lens element is V6, an Abbe number ofthe seventh lens element is V7, an Abbe number of the eighth lenselement is V8, an Abbe number of the ninth lens element is V9, an Abbenumber of the tenth lens element is V10, an Abbe number of the i-th lenselement is Vi, a refractive index of the first lens element is N1, arefractive index of the second lens element is N2, a refractive index ofthe third lens element is N3, a refractive index of the fourth lenselement is N4, a refractive index of the fifth lens element is N5, arefractive index of the sixth lens element is N6, a refractive index ofthe seventh lens element is N7, a refractive index of the eighth lenselement is N8, a refractive index of the ninth lens element is N9, arefractive index of the tenth lens element is N10, and a refractiveindex of the i-th lens element is Ni, at least one lens element of theoptical lens system can satisfy the following condition: 6.0<Vi/Ni<12.0,wherein, depending on the total number of lens elements in the opticallens system, i=1˜9 or i=1˜10. Moreover, at least one lens element of theoptical lens system can also satisfy the following condition:6.0<V/N<11.2. Moreover, at least one lens element of the optical lenssystem can also satisfy the following condition: 7.5<V/N<10. Moreover,at least one lens element of the optical lens system can also satisfythe following condition: 8.0<V/N<12.0.

When a curvature radius of the image-side surface of the ninth lenselement is R18, and the maximum image height of the optical lens systemis ImgH, the following condition can be satisfied: R18/ImgH<1.0.Therefore, it is favorable for reducing the back focal length so as toeffectively utilize the limited space in the optical lens system.Moreover, the following condition can also be satisfied: R18/ImgH<0.60.

When a maximum value among maximum effective radii of all lens surfacesof the optical lens system is Ymax, and a minimum value among maximumeffective radii of all lens surfaces of the optical lens system is Ymin,the following condition can be satisfied: 1.0<Ymax/Ymin<5.0. Therefore,it is favorable for effectively utilizing space by preventing one sideof the barrel from being overly large so as to reduce the size of animage capturing unit. Moreover, the following condition can also besatisfied: 1.0<Ymax/Ymin<2.5.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and a maximum effective radiusof the image-side surface of the ninth lens element is Y92, thefollowing condition can be satisfied: TL/Y92<3.50. Therefore, it isfavorable for properly balancing the miniaturization andmanufacturability of the optical lens system. Moreover, the followingcondition can also be satisfied: TL/Y92<3.0. Please refer to FIG. 27,which shows a schematic view of Y92 according to the 7th embodiment ofthe present disclosure.

When a maximum effective radius of the image-side surface of theimage-side lens element is Yi2, and an axial distance between theimage-side surface of the image-side lens element and the image surfaceis BL, the following condition can be satisfied: 2.0<Yi2/BL<20, wherein,depending on the total number of lens elements in the optical lenssystem, i=9 or 10. Therefore, it is favorable for properly balancing theminiaturization and manufacturability of the optical lens system. Forexample, in the case of the optical lens system including nine lenselements, the maximum effective radius of the image-side surface of theninth lens element is Y92, an axial distance between the image-sidesurface of the ninth lens element and the image surface is BL, and thefollowing condition can be satisfied: 2.0<Y92/BL<20. Moreover, thefollowing condition can also be satisfied: 2.50<Y92/BL<10; in the caseof the optical lens system including ten lens elements, a maximumeffective radius of the image-side surface of the tenth lens element isY102, an axial distance between the image-side surface of the tenth lenselement and the image surface is BL, and the following condition can besatisfied: 2.0<Y102/BL<20. Moreover, the following condition can also besatisfied: 4.0<Y102/BL<10. Please refer to FIG. 27 and FIG. 28, FIG. 27shows a schematic view of Y92 according to the 7th embodiment of thepresent disclosure, and FIG. 28 shows a schematic view of Y102 accordingto the 4th embodiment of the present disclosure.

When a vertical distance between a critical point on the image-sidesurface of the eighth lens element and the optical axis is Yc82, and avertical distance between a critical point on the image-side surface ofthe ninth lens element and the optical axis is Yc92, the followingcondition can be satisfied: 0.50<Yc92/Yc82<2.0. Therefore, it isfavorable for providing better imaging capability with the proper sensorin aspects such as pixel size, resolution or chief ray angle. It is alsofavorable for providing sufficient design flexibility on the shapevariation of the lens elements so as to meet requirements such ascontrolling the size of a lens. Moreover, the following condition canalso be satisfied: 0.50<Yc92/Yc82<1.20. Moreover, when the verticaldistance between the critical point on the image-side surface of theninth lens element and the optical axis is Yc92, and a vertical distancebetween a critical point on the image-side surface of the tenth lenselement and the optical axis is Yc102, the following condition can alsobe satisfied: 0.50<Yc102/Yc92<2.0. Moreover, the following condition canalso be satisfied: 0.50<Yc102/Yc92<1.20. Please refer to FIG. 27 andFIG. 28, FIG. 27 shows a schematic view of Yc82 and Yc92 according tothe 7th embodiment of the present disclosure, and FIG. 28 shows aschematic view of Yc82, Yc92 and Yc102 according to the 4th embodimentof the present disclosure.

When the focal length of the optical lens system is f, and a compositefocal length of the middle lens group is fG2, the following conditioncan be satisfied: −0.75<f/fG2<2.0. Therefore, it is favorable forbalancing the refractive power of the middle lens group and the frontlens group so as to allow better light convergence or correctaberrations and to increase image quality. Moreover, the followingcondition can also be satisfied: −0.50<f/fG2<1.0. Moreover, thefollowing condition can also be satisfied: −0.50<f/fG2<0.50.

When the focal length of the optical lens system is f, and a compositefocal length of the rear lens group is fG3, the following condition canbe satisfied: −2.50<f/fG3<0.60. Therefore, a proper configuration ofrear lens group is favorable for correcting aberrations in theperipheral region and reducing the back focal length of the optical lenssystem. Moreover, the following condition can also be satisfied:−2.50<f/fG3<0. Moreover, the following condition can also be satisfied:−2.50<f/fG3<−1.0.

When the maximum effective radius of the object-side surface of thefirst lens element is Y11, and the maximum image height of the opticallens system is ImgH, the following condition can be satisfied:0.2<Y11/ImgH<1.0. Therefore, it is favorable for adjusting the effectiveradius of the first lens element in a wide field of view configurationso as to effectively miniaturize the optical lens system, therebybecoming applicable to electronic devices with limited accommodationspace.

When the focal length of the optical lens system is f, a focal length ofthe first lens element is f1, a focal length of the second lens elementis f2, a focal length of the third lens element is f3, a focal length ofthe fourth lens element is f4, a focal length of the fifth lens elementis f5, a focal length of the sixth lens element is f6, a focal length ofthe seventh lens element is f7, a focal length of the eighth lenselement is f8, a focal length of the ninth lens element is f9, and afocal length of the ten lens element is f10, the following conditionscan be satisfied: −1.5<f/f1<4.0, −3.0<f/f2<2.0, −3.0<f/f3<3.0,−3.0<f/f4<3.0, −3.0<f/f5<3.0, −3.0<f/f6<3.0, −3.0<f/f7<3.0,−3.0<f/f8<3.0, −3.0<f/f9<3.0 and depending on the total number of lenselements in the optical lens system, −3.0<f/f10<3.0. Therefore, it isfavorable for preventing excessive differences in refractive power ofthe lens elements and image overcorrections. It is also favorable forproviding a proper shape variation for the lens elements so as to reducethe probability of image ghosting. Moreover, the following conditionscan also be satisfied: −1.0<f/f1<2.50, −1.50<f/f2<1.0, −2.0<f/f3<2.0,−2.0<f/f4<2.0, −2.0<f/f5<2.0, −2.0<f/f6<2.0, −2.0<f/f7<2.0,−2.0<f/f8<2.0 and −2.0<f/f9<2.0. Moreover, when the focal length of theoptical lens system is f, and a focal length of the i-th lens element isfi, at least two lens elements of the optical lens system can satisfythe following condition: |f/fi|<0.20, wherein, depending on the totalnumber of lens elements in the optical lens system, i=1˜9 or i=1˜10.Moreover, at least three lens elements of the optical lens system canalso satisfy the following condition: |f/fi|<0.20.

When the total number of inflection points of all lens elements of theoptical lens system is NIF, the following condition can be satisfied:20≤NIF. Therefore, it is favorable for providing better imagingcapability with the proper sensor in aspects such as pixel size,resolution or chief ray angle. It is also favorable for providingsufficient design flexibility on the shape variation of the lenselements so as to meet requirements such as controlling the size of alens. Moreover, the following condition can also be satisfied: 25≤NIF.Please refer to FIG. 27 and FIG. 28, FIG. 27 shows a schematic view ofinflection points P of the object-side surface 791 of the ninth lenselement 790 and the image-side surface 792 of the ninth lens element 790according to the 7th embodiment of the present disclosure, and FIG. 28shows a schematic view of inflection points P of the object-side surface494 of the tenth lens element 493 and the image-side surface 495 of thetenth lens element 493 according to the 4th embodiment of the presentdisclosure. The aforementioned inflection points according to theembodiments of the present disclosure in FIG. 27 and FIG. 28 are onlyexemplary. The other lens surfaces of the lens elements may also haveone or more inflection points.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, the maximum image height ofthe optical lens system is ImgH, and a chief ray angle at a maximumimage height position of the optical lens system is CRA, the followingcondition can be satisfied: TU[ImgH×tan(CRA)]<3.0. Therefore, it isfavorable for properly balancing the miniaturization andmanufacturability of the optical lens system. Moreover, the followingcondition can also be satisfied: TU[ImgH×tan(CRA)]<2.50. Please refer toFIG. 29, which shows a schematic view of CRA according to the 1stembodiment of the present disclosure, wherein a chief ray CR isprojected on the image surface 198 at the maximum image height position,and the angle between a normal line of the image surface 198 and thechief ray CR is CRA.

When the focal length of the optical lens system is f, a curvatureradius of the object-side surface of the ninth lens element is R17, andthe curvature radius of the image-side surface of the ninth lens elementis R18, the following condition can be satisfied: 1.0<|f/R17|+|f/R18|.Therefore, it is favorable for reducing the back focal length so as toeffectively utilize the limited space in the optical lens system.Moreover, the following condition can also be satisfied:2.0<|f/R17|+|f/R18|. Moreover, the following condition can also besatisfied: 3.0<|f/R17|+|f/R18|.

According to the present disclosure, the aforementioned features andconditions can be utilized in numerous combinations so as to achievecorresponding effects.

According to the present disclosure, the lens elements of the opticallens system can be made of either glass or plastic material. When thelens elements are made of glass material, the refractive powerdistribution of the optical lens system may be more flexible. The glasslens element can either be made by grinding or molding. When the lenselements are made of plastic material, the manufacturing costs can beeffectively reduced. Furthermore, surfaces of each lens element can bearranged to be aspheric, which allows more control variables foreliminating aberrations thereof, the required number of the lenselements can be reduced, and the total track length of the optical lenssystem can be effectively shortened. The aspheric surfaces may be formedby plastic injection molding or glass molding.

According to the present disclosure, when a lens surface is aspheric, itmeans that the lens surface has an aspheric shape throughout itsoptically effective area, or a portion(s) thereof.

According to the present disclosure, one or more of the lens elements'material may optionally include an additive which alters the lenselements' transmittance in a specific range of wavelength for areduction in unwanted stray light or color deviation. For example, theadditive may optionally filter out light in the wavelength range of 600nm to 800 nm to reduce excessive red light and/or near infrared light;or may optionally filter out light in the wavelength range of 350 nm to450 nm to reduce excessive blue light and/or near ultraviolet light frominterfering the final image. The additive may be homogeneously mixedwith a plastic material to be used in manufacturing a mixed-materiallens element by injection molding.

According to the present disclosure, each of an object-side surface andan image-side surface has a paraxial region and an off-axis region. Theparaxial region refers to the region of the surface where light raystravel close to the optical axis, and the off-axis region refers to theregion of the surface away from the paraxial region. Particularly,unless otherwise stated, when the lens element has a convex surface, itindicates that the surface is convex in the paraxial region thereof;when the lens element has a concave surface, it indicates that thesurface is concave in the paraxial region thereof. Moreover, when aregion of refractive power or focus of a lens element is not defined, itindicates that the region of refractive power or focus of the lenselement is in the paraxial region thereof.

According to the present disclosure, an inflection point is a point onthe surface of the lens element at which the surface changes fromconcave to convex, or vice versa. A critical point is a non-axial pointof the lens surface where its tangent is perpendicular to the opticalaxis.

According to the present disclosure, the image surface of the opticallens system, based on the corresponding image sensor, can be flat orcurved, especially a curved surface being concave facing towards theobject side of the optical lens system.

According to the present disclosure, an image correction unit, such as afield flattener, can be optionally disposed between the lens elementclosest to the image side of the optical lens system and the imagesurface for correction of aberrations such as field curvature. Theoptical properties of the image correction unit, such as curvature,thickness, index of refraction, position and surface shape (convex orconcave surface with spherical, aspheric, diffractive or Fresnel types),can be adjusted according to the design of the image capturing unit. Ingeneral, a preferable image correction unit is, for example, a thintransparent element having a concave object-side surface and a planarimage-side surface, and the thin transparent element is disposed nearthe image surface.

According to the present disclosure, the optical lens system can includeat least one stop, such as an aperture stop, a glare stop or a fieldstop. Said glare stop or said field stop is set for eliminating thestray light and thereby improving image quality thereof.

According to the present disclosure, an aperture stop can be configuredas a front stop or a middle stop. A front stop disposed between animaged object and the first lens element can provide a longer distancebetween an exit pupil of the optical lens system and the image surfaceto produce a telecentric effect, and thereby improves the image-sensingefficiency of an image sensor (for example, CCD or CMOS). A middle stopdisposed between the first lens element and the image surface isfavorable for enlarging the viewing angle of the optical lens system andthereby provides a wider field of view for the same.

According to the present disclosure, the optical lens system can includean aperture control unit. The aperture control unit may be a mechanicalcomponent or a light modulator, which can control the size and shape ofthe aperture through electricity or electrical signals. The mechanicalcomponent can include a movable member, such as a blade assembly or alight baffle. The light modulator can include a shielding element, suchas a filter, an electrochromic material or a liquid-crystal layer. Theaperture control unit controls the amount of incident light or exposuretime to enhance the capability of image quality adjustment. In addition,the aperture control unit can be the aperture stop of the presentdisclosure, which changes the f-number to obtain different imageeffects, such as the depth of field or lens speed.

According to the above description of the present disclosure, thefollowing specific embodiments are provided for further explanation.

1st Embodiment

FIG. 1 is a schematic view of an image capturing unit according to the1st embodiment of the present disclosure. FIG. 2 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 1stembodiment. In FIG. 1, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 199. The optical lens system includes, in order froman object side to an image side, an aperture stop 100, a first lenselement 110, a second lens element 120, a third lens element 130, afourth lens element 140, a fifth lens element 150, a stop 101, a sixthlens element 160, a seventh lens element 170, an eighth lens element180, a ninth lens element 190, an IR-cut filter 196 and an image surface198. In addition, the optical lens system has a configuration of a frontlens group (the first lens element 110, the second lens element 120 andthe third lens element 130), a middle lens group (the fourth lenselement 140, the fifth lens element 150 and the sixth lens element 160)and a rear lens group (the seventh lens element 170, the eighth lenselement 180 and the ninth lens element 190). The optical lens systemincludes nine lens elements (110˜190) with no additional lens elementdisposed between each of the adjacent nine lens elements.

The first lens element 110 with positive refractive power has anobject-side surface 111 being convex in a paraxial region thereof and animage-side surface 112 being concave in a paraxial region thereof. Thefirst lens element 110 is made of plastic material and has theobject-side surface 111 and the image-side surface 112 being bothaspheric.

The second lens element 120 with positive refractive power has anobject-side surface 121 being convex in a paraxial region thereof and animage-side surface 122 being convex in a paraxial region thereof. Thesecond lens element 120 is made of plastic material and has theobject-side surface 121 and the image-side surface 122 being bothaspheric. The image-side surface 122 of the second lens element 120 hasone inflection point.

The third lens element 130 with negative refractive power has anobject-side surface 131 being concave in a paraxial region thereof andan image-side surface 132 being convex in a paraxial region thereof. Thethird lens element 130 is made of plastic material and has theobject-side surface 131 and the image-side surface 132 being bothaspheric. The object-side surface 131 of the third lens element 130 hasone inflection point. The image-side surface 132 of the third lenselement 130 has three inflection points.

The fourth lens element 140 with negative refractive power has anobject-side surface 141 being convex in a paraxial region thereof and animage-side surface 142 being concave in a paraxial region thereof. Thefourth lens element 140 is made of plastic material and has theobject-side surface 141 and the image-side surface 142 being bothaspheric.

The fifth lens element 150 with negative refractive power has anobject-side surface 151 being convex in a paraxial region thereof and animage-side surface 152 being concave in a paraxial region thereof. Thefifth lens element 150 is made of plastic material and has theobject-side surface 151 and the image-side surface 152 being bothaspheric. The image-side surface 152 of the fifth lens element 150 hasone inflection point.

The sixth lens element 160 with negative refractive power has anobject-side surface 161 being convex in a paraxial region thereof and animage-side surface 162 being concave in a paraxial region thereof. Thesixth lens element 160 is made of plastic material and has theobject-side surface 161 and the image-side surface 162 being bothaspheric. The object-side surface 161 of the sixth lens element 160 hasone inflection point. The image-side surface 162 of the sixth lenselement 160 has two inflection points.

The seventh lens element 170 with positive refractive power has anobject-side surface 171 being convex in a paraxial region thereof and animage-side surface 172 being convex in a paraxial region thereof. Theseventh lens element 170 is made of plastic material and has theobject-side surface 171 and the image-side surface 172 being bothaspheric. The object-side surface 171 of the seventh lens element 170has three inflection points. The image-side surface 172 of the seventhlens element 170 has two inflection points. The object-side surface 171of the seventh lens element 170 has at least one critical point in anoff-axis region thereof. The image-side surface 172 of the seventh lenselement 170 has at least one critical point in an off-axis regionthereof.

The eighth lens element 180 with negative refractive power has anobject-side surface 181 being convex in a paraxial region thereof and animage-side surface 182 being concave in a paraxial region thereof. Theeighth lens element 180 is made of plastic material and has theobject-side surface 181 and the image-side surface 182 being bothaspheric. The object-side surface 181 of the eighth lens element 180 hastwo inflection points. The image-side surface 182 of the eighth lenselement 180 has one inflection point. The image-side surface 182 of theeighth lens element 180 has at least one critical point in an off-axisregion thereof.

The ninth lens element 190 with negative refractive power has anobject-side surface 191 being concave in a paraxial region thereof andan image-side surface 192 being convex in a paraxial region thereof. Theninth lens element 190 is made of plastic material and has theobject-side surface 191 and the image-side surface 192 being bothaspheric. The object-side surface 191 of the ninth lens element 190 hasone inflection point. The image-side surface 192 of the ninth lenselement 190 has one inflection point.

The IR-cut filter 196 is made of glass material and located between theninth lens element 190 and the image surface 198, and will not affectthe focal length of the optical lens system. The image sensor 199 isdisposed on or near the image surface 198 of the optical lens system.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{\left( {Y^{2}/R} \right)/\left( {1 + {{sqrt}\left( {1 - {\left( {1 + k} \right) \times \left( {Y/R} \right)^{2}}} \right)}} \right)} + {\sum\limits_{i}{({Ai}) \times \left( Y^{i} \right)}}}},$where,

X is the relative distance between a point on the aspheric surfacespaced at a distance Y from an optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;

Y is the vertical distance from the point on the aspheric surface to theoptical axis;

R is the curvature radius;

k is the conic coefficient; and

Ai is the i-th aspheric coefficient, and in the embodiments, i may be,but is not limited to, 4, 6, 8, 10, 12, 14 and 16.

In the optical lens system of the image capturing unit according to the1st embodiment, when a focal length of the optical lens system is f, anf-number of the optical lens system is Fno, and half of a maximum fieldof view of the optical lens system is HFOV, these parameters have thefollowing values: f=6.17 millimeters (mm), Fno=2.23, HFOV=25.0 degrees(deg.).

When the maximum field of view of the optical lens system is FOV, thefollowing condition is satisfied: FOV=50.0 [deg.].

When an Abbe number of the first lens element 110 is V1, and arefractive index of the first lens element 110 is N1, the followingcondition is satisfied: V1/N1=36.26.

When an Abbe number of the second lens element 120 is V2, and arefractive index of the second lens element 120 is N2, the followingcondition is satisfied: V2/N2=36.26.

When an Abbe number of the third lens element 130 is V3, and arefractive index of the third lens element 130 is N3, the followingcondition is satisfied: V3/N3=16.09.

When an Abbe number of the fourth lens element 140 is V4, and arefractive index of the fourth lens element 140 is N4, the followingcondition is satisfied: V4/N4=14.31.

When an Abbe number of the fifth lens element 150 is V5, and arefractive index of the fifth lens element 150 is N5, the followingcondition is satisfied: V5/N5=23.91.

When an Abbe number of the sixth lens element 160 is V6, and arefractive index of the sixth lens element 160 is N6, the followingcondition is satisfied: V6/N6=11.65.

When an Abbe number of the seventh lens element 170 is V7, and arefractive index of the seventh lens element 170 is N7, the followingcondition is satisfied: V7/N7=14.31.

When an Abbe number of the eighth lens element 180 is V8, and arefractive index of the eighth lens element 180 is N8, the followingcondition is satisfied: V8/N8=36.26.

When an Abbe number of the ninth lens element 190 is V9, and arefractive index of the ninth lens element 190 is N9, the followingcondition is satisfied: V9/N9=11.65.

When a minimum value among Abbe numbers of all lens elements of theoptical lens system is Vmin, the following condition is satisfied:Vmin=19.4. In this embodiment, among the nine lens elements (110˜190),the Abbe number of the sixth lens element 160 is equal to the Abbenumber of the ninth lens element 190, and both are smaller than the Abbenumbers of the other lens elements. Thus, Vmin is equal to the Abbenumber of the sixth lens element 160 and the Abbe number of the ninthlens element 190.

When the total number of lens elements having the Abbe number smallerthan 40 in the optical lens system is V40, the following condition issatisfied: V40=6.

When the total number of lens elements having the Abbe number smallerthan 30 in the optical lens system is V30, the following condition issatisfied: V30=5.

When the total number of lens elements having the Abbe number smallerthan 20 in the optical lens system is V20, the following condition issatisfied: V20=2.

When an axial distance between the aperture stop 100 and the image-sidesurface 192 of the ninth lens element 190 is Sd, and an axial distancebetween the object-side surface 111 of the first lens element 110 andthe image-side surface 192 of the ninth lens element 190 is Td, thefollowing condition is satisfied: Sd/Td=0.89.

When the axial distance between the object-side surface 111 of the firstlens element 110 and the image-side surface 192 of the ninth lenselement 190 is Td, and a sum of central thicknesses of all lens elementsof the optical lens system is ΣCT, the following condition is satisfied:Td/ΣCT=1.56. In this embodiment, an axial distance between two adjacentlens elements is an air gap in a paraxial region between the twoadjacent lens elements; ΣCT is the sum of the central thicknesses of thefirst lens element 110, the second lens element 120, the third lenselement 130, the fourth lens element 140, the fifth lens element 150,the sixth lens element 160, the seventh lens element 170, the eighthlens element 180 and the ninth lens element 190.

When an axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 198 is TL, and a maximum imageheight of the optical lens system is ImgH, the following condition issatisfied: TL/ImgH=2.05.

When the axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 198 is TL, and an entrance pupildiameter of the optical lens system is EPD, the following condition issatisfied: TL/EPD=2.17.

When the axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 198 is TL, and the focal lengthof the optical lens system is f, the following condition is satisfied:TL/f=0.97.

When the axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 198 is TL, the maximum imageheight of the optical lens system is ImgH, and a chief ray angle at amaximum image height position of the optical lens system is CRA, thefollowing condition is satisfied: TU[ImgH×tan(CRA)]=3.90.

When a maximum effective radius of the object-side surface 111 of thefirst lens element 110 is Y11, and the maximum image height of theoptical lens system is ImgH, the following condition is satisfied:Y11/ImgH=0.47.

When a maximum value among maximum effective radii of all lens surfacesof the optical lens system is Ymax, and a minimum value among maximumeffective radii of all lens surfaces of the optical lens system is Ymin,the following condition is satisfied: Ymax/Ymin=2.18.

When the focal length of the optical lens system is f, and a compositefocal length of the first lens element 110, the second lens element 120and the third lens element 130 is f123, the following condition issatisfied: f123/f=0.54.

When the composite focal length of the first lens element 110, thesecond lens element 120 and the third lens element 130 is f123, and acomposite focal length of the fourth lens element 140, the fifth lenselement 150 and the sixth lens element 160 is f456, the followingcondition is satisfied: f123/f456=−0.93.

When a curvature radius of the image-side surface 192 of the ninth lenselement 190 is R18, and the maximum image height of the optical lenssystem is ImgH, the following condition is satisfied: R18/ImgH=−11.64.

When the axial distance between the object-side surface 111 of the firstlens element 110 and the image surface 198 is TL, and a maximumeffective radius of the image-side surface 192 of the ninth lens element190 is Y92, the following condition is satisfied: TL/Y92=2.73.

When the maximum effective radius of the image-side surface 192 of theninth lens element 190 is Y92, and an axial distance between theimage-side surface 192 of the ninth lens element 190 and the imagesurface 198 is BL, the following condition is satisfied: Y92/BL=2.58.

When the focal length of the optical lens system is f, and a compositefocal length of the front lens group is fG1, the following condition issatisfied: fG1/f=0.54. In this embodiment, the composite focal length ofthe front lens group, namely fG1, is the composite focal length of thefirst lens element 110, the second lens element 120 and the third lenselement 130, namely f123.

When the focal length of the optical lens system is f, and a compositefocal length of the middle lens group is fG2, the following condition issatisfied: f/fG2=−0.16. In this embodiment, the composite focal lengthof the middle lens group, namely fG2, is the composite focal length ofthe fourth lens element 140, the fifth lens element 150 and the sixthlens element 160, namely f456.

When the focal length of the optical lens system is f, and a compositefocal length of the rear lens group is fG3, the following condition issatisfied: f/fG3=−1.72. In this embodiment, the composite focal lengthof the rear lens group, namely fG3, is a composite focal length of theseventh lens element 170, the eighth lens element 180 and the ninth lenselement 190, namely f789.

When the focal length of the optical lens system is f, and a focallength of the first lens element 110 is f1, the following condition issatisfied: f/f1=1.24. Moreover, the following condition can also besatisfied: |f/f1|=1.24.

When the focal length of the optical lens system is f, and a focallength of the second lens element 120 is f2, the following condition issatisfied: f/f2=1.03. Moreover, the following condition can also besatisfied: |f/f2|=1.03.

When the focal length of the optical lens system is f, and a focallength of the third lens element 130 is f3, the following condition issatisfied: f/f3=−0.35. Moreover, the following condition can also besatisfied: |f/f3|=0.35.

When the focal length of the optical lens system is f, and a focallength of the fourth lens element 140 is f4, the following condition issatisfied: f/f4=−0.71. Moreover, the following condition can also besatisfied: |f/f4|=0.71.

When the focal length of the optical lens system is f, and a focallength of the fifth lens element 150 is f5, the following condition issatisfied: f/f5=−0.39. Moreover, the following condition can also besatisfied: |f/f5|=0.39.

When the focal length of the optical lens system is f, and a focallength of the sixth lens element 160 is f6, the following condition issatisfied: f/f6=−0.52. Moreover, the following condition can also besatisfied: |f/f6|=0.52.

When the focal length of the optical lens system is f, and a focallength of the seventh lens element 170 is f7, the following condition issatisfied: f/f7=0.79. Moreover, the following condition can also besatisfied: |f/f7|=0.79.

When the focal length of the optical lens system is f, and a focallength of the eighth lens element 180 is f8, the following condition issatisfied: f/f8=−1.05. Moreover, the following condition can also besatisfied: |f/f8|=1.05.

When the focal length of the optical lens system is f, and a focallength of the ninth lens element 190 is f9, the following condition issatisfied: f/f9=−0.01. Moreover, the following condition can also besatisfied: |f/f9|=0.01.

When the focal length of the optical lens system is f, a curvatureradius of the object-side surface 191 of the ninth lens element 190 isR17, and the curvature radius of the image-side surface 192 of the ninthlens element 190 is R18, the following condition is satisfied:|f/R17|+|f/R18|=0.37.

When the total number of inflection points of all lens elements of theoptical lens system is NIF, the following condition is satisfied:NIF=19.

The detailed optical data of the 1st embodiment are shown in Table 1 andthe aspheric surface data are shown in Table 2 below.

TABLE 1 1st Embodiment f = 6.17 mm, Fno = 2.23, HFOV = 25.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.588 2 Lens 1 1.825 (ASP) 0.600Plastic 1.544 56.0 4.99 3 4.920 (ASP) 0.035 4 Lens 2 4.650 (ASP) 0.469Plastic 1.544 56.0 6.00 5 −10.540 (ASP) 0.035 6 Lens 3 −9.781 (ASP)0.300 Plastic 1.614 26.0 −17.50 7 −110.999 (ASP) 0.035 8 Lens 4 26.779(ASP) 0.220 Plastic 1.633 23.4 −8.67 9 4.537 (ASP) 0.249 10 Lens 5 5.649(ASP) 0.265 Plastic 1.566 37.4 −15.83 11 3.406 (ASP) 0.132 12 Stop Plano0.330 13 Lens 6 34.240 (ASP) 0.260 Plastic 1.669 19.4 −11.98 14 6.473(ASP) 0.117 15 Lens 7 30.108 (ASP) 0.280 Plastic 1.633 23.4 7.82 16−5.896 (ASP) 0.516 17 Lens 8 11443.228 (ASP) 0.300 Plastic 1.544 56.0−5.89 18 3.204 (ASP) 0.403 19 Lens 9 −32.425 (ASP) 0.605 Plastic 1.66919.4 −1106.63 20 −34.163 (ASP) 0.300 21 IR-cut Filter Plano 0.210 Glass1.517 64.2 — 22 Plano 0.341 23 Image Plano 0.000 Note: Referencewavelength is 587.6 nm (d-line). An effective radius of the stop 101(Surface 12) is 1.000 mm.

TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 6 k = −1.6793E−010.0000E+00 0.0000E+00  0.0000E+00 0.0000E+00 A4 = −1.3041E−03 4.0322E−036.1661E−03 −3.4810E−03 −6.8672E−03  A6 = −1.0934E−03 −3.0686E−02 −4.6970E−02  −4.3724E−02 3.0033E−03 A8 =  1.5592E−03 8.4270E−021.1338E−01  1.6017E−01 8.3513E−02 A10 = −1.9917E−03 −1.0310E−01 −1.4059E−01  −2.4696E−01 −1.8767E−01  A12 =  1.0940E−03 6.8342E−029.5747E−02  2.0272E−01 1.7689E−01 A14 = −3.1815E−04 −2.4640E−02 −3.4746E−02  −8.5562E−02 −8.0436E−02  A16 = — 3.7822E−03 5.3305E−03 1.4560E−02 1.4446E−02 Surface # 7 8 9 10 11 k = 9.0000E+01 9.0000E+01−8.0832E+01 −4.6264E+00 2.6355E+00 A4 = −2.6456E−02  −1.6636E−02  9.0066E−02 −1.1511E−01 −1.2541E−01  A6 = 1.6704E−01 1.7327E−01−8.7433E−02  1.6017E−01 1.4180E−01 A8 = −3.3425E−01  −3.0664E−01  2.1656E−01 −1.6660E−01 −1.6573E−01  A10 = 3.1555E−01 3.4115E−01−1.9265E−01  2.0921E−01 1.1980E−01 A12 = −1.4899E−01  −1.8510E−01  1.4104E−01 −1.3241E−01 −5.3045E−02  A14 = 2.8373E−02 3.7946E−02−4.5541E−02  3.7179E−02 9.8558E−04 Surface # 13 14 15 16 17 k =−9.0000E+01  2.1728E+01 −9.0000E+01 −8.6774E+00  9.0000E+01 A4 =−2.7200E−01 −3.9601E−01 −1.6301E−01  2.2421E−02 −1.0861E−01 A6 = 2.3641E−01  3.6315E−01  5.5860E−02 −5.0471E−02  5.4741E−02 A8 =−5.2267E−01 −4.5543E−01  1.6811E−01  1.1346E−01 −5.3788E−02 A10 = 6.2974E−01  4.9388E−01 −1.8889E−01 −8.7887E−02  4.4537E−02 A12 =−6.3791E−01 −4.1117E−01  8.6161E−02  3.2900E−02 −1.9231E−02 A14 = 3.6579E−01  2.2228E−01 −1.9034E−02 −6.1886E−03  3.9517E−03 A16 =−7.5884E−02 −4.9505E−02  1.6730E−03  4.6835E−04 −3.0633E−04 Surface # 1819 20 k = −2.8333E+01  8.3542E+01 −2.3015E+01 A4 = −7.0600E−02−1.0569E−01 −9.6782E−02 A6 =  1.5218E−02  6.3432E−02  4.4691E−02 A8 =−1.1209E−02 −5.0764E−02 −2.5110E−02 A10 =  6.5934E−03  2.4963E−02 9.5726E−03 A12 = −1.7756E−03 −7.1068E−03 −2.1794E−03 A14 =  1.7921E−04 1.1148E−03  2.5905E−04 A16 = −2.2417E−06 −7.3451E−05 −1.1934E−05

In Table 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-23 represent the surfacessequentially arranged from the object side to the image side along theoptical axis. In Table 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-16 represent the asphericcoefficients ranging from the 4th order to the 16th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as Table 1 and Table 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided again.

2nd Embodiment

FIG. 3 is a schematic view of an image capturing unit according to the2nd embodiment of the present disclosure. FIG. 4 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 2ndembodiment. In FIG. 3, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 299. The optical lens system includes, in order froman object side to an image side, a first lens element 210, an aperturestop 200, a second lens element 220, a third lens element 230, a stop201, a fourth lens element 240, a fifth lens element 250, a stop 202, asixth lens element 260, a seventh lens element 270, an eighth lenselement 280, a ninth lens element 290, an IR-cut filter 296 and an imagesurface 298. In addition, the optical lens system has a configuration ofa front lens group (the first lens element 210, the second lens element220 and the third lens element 230), a middle lens group (the fourthlens element 240, the fifth lens element 250 and the sixth lens element260) and a rear lens group (the seventh lens element 270, the eighthlens element 280 and the ninth lens element 290). The optical lenssystem includes nine lens elements (210˜290) with no additional lenselement disposed between each of the adjacent nine lens elements.

The first lens element 210 with negative refractive power has anobject-side surface 211 being convex in a paraxial region thereof and animage-side surface 212 being concave in a paraxial region thereof. Thefirst lens element 210 is made of plastic material and has theobject-side surface 211 and the image-side surface 212 being bothaspheric. The object-side surface 211 of the first lens element 210 hastwo inflection points. The image-side surface 212 of the first lenselement 210 has two inflection points.

The second lens element 220 with positive refractive power has anobject-side surface 221 being convex in a paraxial region thereof and animage-side surface 222 being concave in a paraxial region thereof. Thesecond lens element 220 is made of plastic material and has theobject-side surface 221 and the image-side surface 222 being bothaspheric. The object-side surface 221 of the second lens element 220 hasone inflection point. The image-side surface 222 of the second lenselement 220 has one inflection point.

The third lens element 230 with negative refractive power has anobject-side surface 231 being convex in a paraxial region thereof and animage-side surface 232 being concave in a paraxial region thereof. Thethird lens element 230 is made of plastic material and has theobject-side surface 231 and the image-side surface 232 being bothaspheric.

The fourth lens element 240 with negative refractive power has anobject-side surface 241 being convex in a paraxial region thereof and animage-side surface 242 being concave in a paraxial region thereof. Thefourth lens element 240 is made of plastic material and has theobject-side surface 241 and the image-side surface 242 being bothaspheric. The object-side surface 241 of the fourth lens element 240 hasone inflection point. The image-side surface 242 of the fourth lenselement 240 has two inflection points.

The fifth lens element 250 with positive refractive power has anobject-side surface 251 being concave in a paraxial region thereof andan image-side surface 252 being convex in a paraxial region thereof. Thefifth lens element 250 is made of plastic material and has theobject-side surface 251 and the image-side surface 252 being bothaspheric. The object-side surface 251 of the fifth lens element 250 hasone inflection point. The image-side surface 252 of the fifth lenselement 250 has one inflection point.

The sixth lens element 260 with positive refractive power has anobject-side surface 261 being convex in a paraxial region thereof and animage-side surface 262 being concave in a paraxial region thereof. Thesixth lens element 260 is made of plastic material and has theobject-side surface 261 and the image-side surface 262 being bothaspheric. The object-side surface 261 of the sixth lens element 260 hasthree inflection points. The image-side surface 262 of the sixth lenselement 260 has three inflection points.

The seventh lens element 270 with negative refractive power has anobject-side surface 271 being convex in a paraxial region thereof and animage-side surface 272 being concave in a paraxial region thereof. Theseventh lens element 270 is made of plastic material and has theobject-side surface 271 and the image-side surface 272 being bothaspheric. The object-side surface 271 of the seventh lens element 270has two inflection points. The image-side surface 272 of the seventhlens element 270 has two inflection points. The object-side surface 271of the seventh lens element 270 has at least one critical point in anoff-axis region thereof. The image-side surface 272 of the seventh lenselement 270 has at least one critical point in an off-axis regionthereof.

The eighth lens element 280 with positive refractive power has anobject-side surface 281 being convex in a paraxial region thereof and animage-side surface 282 being concave in a paraxial region thereof. Theeighth lens element 280 is made of plastic material and has theobject-side surface 281 and the image-side surface 282 being bothaspheric. The object-side surface 281 of the eighth lens element 280 hasthree inflection points. The image-side surface 282 of the eighth lenselement 280 has two inflection points. The object-side surface 281 ofthe eighth lens element 280 has at least one critical point in anoff-axis region thereof. The image-side surface 282 of the eighth lenselement 280 has at least one critical point in an off-axis regionthereof.

The ninth lens element 290 with negative refractive power has anobject-side surface 291 being concave in a paraxial region thereof andan image-side surface 292 being concave in a paraxial region thereof.The ninth lens element 290 is made of plastic material and has theobject-side surface 291 and the image-side surface 292 being bothaspheric. The object-side surface 291 of the ninth lens element 290 hastwo inflection points. The image-side surface 292 of the ninth lenselement 290 has three inflection points. The object-side surface 291 ofthe ninth lens element 290 has at least one critical point in anoff-axis region thereof. The image-side surface 292 of the ninth lenselement 290 has at least one critical point in an off-axis regionthereof.

The IR-cut filter 296 is made of glass material and located between theninth lens element 290 and the image surface 298, and will not affectthe focal length of the optical lens system. The image sensor 299 isdisposed on or near the image surface 298 of the optical lens system.

When a vertical distance between a critical point on the image-sidesurface 282 of the eighth lens element 280 and the optical axis is Yc82,and a vertical distance between a critical point on the image-sidesurface 292 of the ninth lens element 290 and the optical axis is Yc92,the following condition is satisfied: Yc92/Yc82=0.88.

The detailed optical data of the 2nd embodiment are shown in Table 3 andthe aspheric surface data are shown in Table 4 below.

TABLE 3 2nd Embodiment f = 6.73 mm, Fno = 1.70, HFOV = 41.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 35.063 (ASP) 0.402 Plastic 1.686 18.4 −427.34 231.171 (ASP) 0.939 3 Ape. Stop Plano −0.889 4 Lens 2 2.610 (ASP) 1.145Plastic 1.544 56.0 5.77 5 13.052 (ASP) 0.057 6 Lens 3 11.632 (ASP) 0.300Plastic 1.669 19.5 −16.85 7 5.665 (ASP) 0.369 8 Stop Plano 0.132 9 Lens4 17.822 (ASP) 0.324 Plastic 1.686 18.4 −84.08 10 13.515 (ASP) 0.111 11Lens 5 −21.027 (ASP) 0.553 Plastic 1.544 56.0 72.86 12 −13.866 (ASP)−0.184 13 Stop Plano 0.263 14 Lens 6 24.350 (ASP) 0.486 Plastic 1.54456.0 48.15 15 343.512 (ASP) 0.631 16 Lens 7 10.761 (ASP) 0.525 Plastic1.566 37.4 −30.34 17 6.499 (ASP) 0.241 18 Lens 8 2.918 (ASP) 0.566Plastic 1.544 56.0 9.74 19 6.049 (ASP) 0.903 20 Lens 9 −12.001 (ASP)0.663 Plastic 1.534 55.9 −5.82 21 4.276 (ASP) 0.500 22 IR-cut FilterPlano 0.210 Glass 1.517 64.2 — 23 Plano 0.233 24 Image Plano 0.000 Note:Reference wavelength is 587.6 nm (d-line). An effective radius of thestop 201 (Surface 8) is 1.615 mm. An effective radius of the image-sidesurface 242 (Surface 10) is 1.720 mm. An effective radius of the stop202 (Surface 13) is 2.121 mm.

TABLE 4 Aspheric Coefficients Surface # 1 2 4 5 6 k = 0.0000E+000.0000E+00 −5.6854E−01 −9.8912E+01 2.9317E+01 A4 = 8.2853E−04 7.9731E−04 2.8294E−03 −1.6374E−02 −2.7342E−02  A6 = −2.0426E−04  −2.1767E−04  3.7305E−03  1.9113E−02 2.8532E−02 A8 = 3.3835E−05 3.3657E−05−3.3618E−03 −8.3544E−03 −1.4515E−02  A10 = −5.2654E−06  −6.6067E−06  2.1010E−03  1.3383E−03 4.1124E−03 A12 = 3.1313E−07 4.9053E−07−7.2817E−04  1.9086E−04 −5.2045E−04  A14 = — —  1.3481E−04 −8.9688E−052.1430E−05 A16 = — — −1.0708E−05  7.5511E−06 5.2132E−07 Surface # 7 9 1011 12 k = 8.4227E+00  9.7302E−01  2.5499E+01 −3.3794E+01 3.5640E+01 A4 =−1.3268E−02  −3.0466E−02 −1.1479E−02  3.1180E−02 4.9191E−02 A6 =1.3692E−02 −2.5916E−03 −3.6334E−02 −6.4580E−02 −9.4395E−02  A8 =−9.2563E−03   3.5771E−03  5.3363E−02  8.9593E−02 8.1175E−02 A10 =4.0087E−03 −3.5610E−03 −5.1619E−02 −8.4614E−02 −3.8351E−02  A12 =−1.0264E−03   2.0689E−03  2.9788E−02  4.7694E−02 6.9345E−03 A14 =1.4729E−04 −4.6011E−04 −9.5772E−03 −1.5448E−02 1.6356E−03 A16 = — 2.9441E−05  1.6258E−03  2.6818E−03 −1.0845E−03  A18 = — — −1.1559E−04−1.9373E−04 2.0871E−04 A20 = — — — — −1.4446E−05  Surface # 14 15 16 1718 k = −9.9000E+01 −9.9000E+01  9.2943E+00 −5.3014E+01 −1.1729E+00 A4 = 3.2079E−02 −3.4384E−03 −1.3332E−02 −2.5696E−02 −3.3909E−02 A6 =−8.2039E−02 −1.4274E−02  5.0372E−03  7.5864E−03  2.8139E−03 A8 = 5.8017E−02  3.7941E−03 −6.3266E−03 −3.0138E−03 −2.5176E−03 A10 =−2.0884E−02  1.5266E−03  3.4717E−03  8.1875E−04  1.2147E−03 A12 = 1.4514E−03 −1.6237E−03 −1.2525E−03 −1.7883E−04 −3.2496E−04 A14 = 1.5110E−03  5.8732E−04  2.8990E−04  2.9004E−05  4.9268E−05 A16 =−5.1651E−04 −1.0480E−04 −4.1139E−05 −2.8961E−06 −4.1600E−06 A18 = 6.6464E−05  9.1807E−06  3.2252E−06  1.5277E−07  1.8286E−07 A20 =−3.1367E−06 −3.1548E−07 −1.0550E−07 −3.2345E−09 −3.2735E−09 Surface # 1920 21 k = −1.7515E+01 4.5409E+00 −4.2995E−01 A4 =  2.1587E−02−4.1903E−02  −4.3037E−02 A6 = −1.8281E−02 4.2900E−03  6.8263E−03 A8 = 5.2094E−03 3.4806E−04 −8.7168E−04 A10 = −9.3311E−04 −1.0470E−04  8.2718E−05 A12 =  1.0622E−04 1.0102E−05 −5.4237E−06 A14 = −7.4962E−06−5.4345E−07   2.2875E−07 A16 =  3.1209E−07 1.7435E−08 −5.7501E−09 A18 =−6.7367E−09 −3.1427E−10   7.6186E−11 A20 =  5.2090E−11 2.4666E−12−3.9430E−13

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, except for the Yc82 and Yc92 mentioned in thisembodiment, the definitions of these parameters shown in the followingtable are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from Table 3 and Table 4 asthe following values and satisfy the following conditions:

2nd Embodiment f [mm] 6.73 R18/ImgH 0.71 Fno 1.70 TL/Y92 1.71 HFOV[deg.] 41.0 Y92/BL 5.25 FOV [deg.] 82.0 Yc92/Yc82 0.88 V1/N1 10.90 fG1/f1.20 V2/N2 36.26 f/fG2 −0.53 V3/N3 11.65 f/fG3 0.15 V4/N4 10.90 f/f1−0.02 V5/N5 36.26 |f/f1| 0.02 V6/N6 36.26 f/f2 1.17 V7/N7 23.91 |f/f2|1.17 V8/N8 36.26 f/f3 −0.40 V9/N9 36.46 |f/f3| 0.40 Vmin 18.4 f/f4 −0.08V40 4 |f/f4| 0.08 V30 3 f/f5 0.09 V20 3 |f/f5| 0.09 Sd/Td 0.82 f/f6 0.14Td/ΣCT 1.52 |f/f6| 0.14 TL/ImgH 1.41 f/f7 −0.22 TL/EPD 2.14 |f/f7| 0.22TL/f 1.26 f/f8 0.69 TL/[ImgH × tan(CRA)] 2.10 |f/f8| 0.69 Y11/ImgH 0.48f/f9 −1.16 Ymax/Ymin 3.07 |f/f9| 1.16 f123/f 1.20 |f/R17| + |f/R18| 2.13f123/f456 0.18 NIF 31

3rd Embodiment

FIG. 5 is a schematic view of an image capturing unit according to the3rd embodiment of the present disclosure. FIG. 6 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 3rdembodiment. In FIG. 5, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 399. The optical lens system includes, in order froman object side to an image side, a first lens element 310, a stop 301, asecond lens element 320, an aperture stop 300, a third lens element 330,a fourth lens element 340, a fifth lens element 350, a sixth lenselement 360, a seventh lens element 370, an eighth lens element 380, aninth lens element 390, an IR-cut filter 396 and an image surface 398.In addition, the optical lens system has a configuration of a front lensgroup (the first lens element 310, the second lens element 320 and thethird lens element 330), a middle lens group (the fourth lens element340, the fifth lens element 350 and the sixth lens element 360) and arear lens group (the seventh lens element 370, the eighth lens element380 and the ninth lens element 390). The optical lens system includesnine lens elements (310˜390) with no additional lens element disposedbetween each of the adjacent nine lens elements.

The first lens element 310 with negative refractive power has anobject-side surface 311 being concave in a paraxial region thereof andan image-side surface 312 being convex in a paraxial region thereof. Thefirst lens element 310 is made of plastic material and has theobject-side surface 311 and the image-side surface 312 being bothaspheric. The object-side surface 311 of the first lens element 310 hasone inflection point. The image-side surface 312 of the first lenselement 310 has one inflection point. The object-side surface 311 of thefirst lens element 310 has at least one convex critical point in anoff-axis region thereof.

The second lens element 320 with positive refractive power has anobject-side surface 321 being convex in a paraxial region thereof and animage-side surface 322 being concave in a paraxial region thereof. Thesecond lens element 320 is made of plastic material and has theobject-side surface 321 and the image-side surface 322 being bothaspheric. The object-side surface 321 of the second lens element 320 hasone inflection point. The image-side surface 322 of the second lenselement 320 has one inflection point.

The third lens element 330 with negative refractive power has anobject-side surface 331 being concave in a paraxial region thereof andan image-side surface 332 being concave in a paraxial region thereof.The third lens element 330 is made of plastic material and has theobject-side surface 331 and the image-side surface 332 being bothaspheric. The image-side surface 332 of the third lens element 330 hastwo inflection points.

The fourth lens element 340 with positive refractive power has anobject-side surface 341 being concave in a paraxial region thereof andan image-side surface 342 being convex in a paraxial region thereof. Thefourth lens element 340 is made of plastic material and has theobject-side surface 341 and the image-side surface 342 being bothaspheric. The object-side surface 341 of the fourth lens element 340 hastwo inflection points.

The fifth lens element 350 with positive refractive power has anobject-side surface 351 being concave in a paraxial region thereof andan image-side surface 352 being convex in a paraxial region thereof. Thefifth lens element 350 is made of plastic material and has theobject-side surface 351 and the image-side surface 352 being bothaspheric. The image-side surface 352 of the fifth lens element 350 hasfour inflection points.

The sixth lens element 360 with negative refractive power has anobject-side surface 361 being concave in a paraxial region thereof andan image-side surface 362 being concave in a paraxial region thereof.The sixth lens element 360 is made of plastic material and has theobject-side surface 361 and the image-side surface 362 being bothaspheric. The object-side surface 361 of the sixth lens element 360 hastwo inflection points. The image-side surface 362 of the sixth lenselement 360 has two inflection points.

The seventh lens element 370 with negative refractive power has anobject-side surface 371 being concave in a paraxial region thereof andan image-side surface 372 being convex in a paraxial region thereof. Theseventh lens element 370 is made of plastic material and has theobject-side surface 371 and the image-side surface 372 being bothaspheric. The object-side surface 371 of the seventh lens element 370has one inflection point. The image-side surface 372 of the seventh lenselement 370 has one inflection point.

The eighth lens element 380 with positive refractive power has anobject-side surface 381 being concave in a paraxial region thereof andan image-side surface 382 being convex in a paraxial region thereof. Theeighth lens element 380 is made of plastic material and has theobject-side surface 381 and the image-side surface 382 being bothaspheric. The object-side surface 381 of the eighth lens element 380 hastwo inflection points. The image-side surface 382 of the eighth lenselement 380 has two inflection points.

The ninth lens element 390 with negative refractive power has anobject-side surface 391 being convex in a paraxial region thereof and animage-side surface 392 being concave in a paraxial region thereof. Theninth lens element 390 is made of plastic material and has theobject-side surface 391 and the image-side surface 392 being bothaspheric. The object-side surface 391 of the ninth lens element 390 hasthree inflection points. The image-side surface 392 of the ninth lenselement 390 has three inflection points. The object-side surface 391 ofthe ninth lens element 390 has at least one critical point in anoff-axis region thereof. The image-side surface 392 of the ninth lenselement 390 has at least one critical point in an off-axis regionthereof.

The IR-cut filter 396 is made of glass material and located between theninth lens element 390 and the image surface 398, and will not affectthe focal length of the optical lens system. The image sensor 399 isdisposed on or near the image surface 398 of the optical lens system.

When a vertical distance between the critical point on the object-sidesurface 311 of the first lens element 310 and the optical axis is Yc11,and a maximum effective radius of the object-side surface 311 of thefirst lens element 310 is Y11, the following condition can be satisfied:Yc11/Y11=0.54.

The detailed optical data of the 3rd embodiment are shown in Table 5 andthe aspheric surface data are shown in Table 6 below.

TABLE 5 3rd Embodiment f = 4.37 mm, Fno = 1.90, HFOV = 50.3 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 −3.308 (ASP) 0.307 Plastic 1.544 56.0 −40.52 2−4.020 (ASP) 0.392 3 Stop Plano −0.362 4 Lens 2 1.819 (ASP) 0.585Plastic 1.554 48.0 6.97 5 3.043 (ASP) 0.351 6 Ape. Stop Plano 0.067 7Lens 3 −122.910 (ASP) 0.250 Plastic 1.582 30.2 −66.90 8 57.096 (ASP)0.056 9 Lens 4 −82.680 (ASP) 0.695 Plastic 1.544 56.0 4.82 10 −2.551(ASP) 0.030 11 Lens 5 −27.114 (ASP) 0.250 Plastic 1.669 19.4 15.02 12−7.359 (ASP) 0.050 13 Lens 6 −7.038 (ASP) 0.250 Plastic 1.669 19.4 −5.6314 8.229 (ASP) 0.585 15 Lens 7 −3.873 (ASP) 0.355 Plastic 1.669 19.4−22.02 16 −5.448 (ASP) 0.092 17 Lens 8 −4.216 (ASP) 0.930 Plastic 1.54456.0 2.27 18 −1.029 (ASP) 0.078 19 Lens 9 5.029 (ASP) 0.576 Plastic1.559 40.4 −2.34 20 0.994 (ASP) 1.000 21 IR-cut Filter Plano 0.210 Glass1.517 64.2 — 22 Plano 0.276 23 Image Plano 0.000 Note: Referencewavelength is 587.6 nm (d-line). An effective radius of the stop 301(Surface 3) is 1.450 mm. An effective radius of the image-side surface362 (Surface 14) is 1.640 mm. An effective radius of the image-sidesurface 382 (Surface 18) is 2.600 mm.

TABLE 6 Aspheric Coefficients Surface # 1 2 4 5 7 k = −2.7605E+01−1.7003E+01 3.7466E−01 −1.3225E+01 0.0000E+00 A4 =  4.3230E−02 7.5283E−02 −6.8422E−02  −1.3774E−02 −5.7229E−02  A6 = −1.1289E−02−3.5253E−02 4.6100E−02  1.1404E−02 5.5294E−02 A8 =  6.6762E−03 2.7773E−02 −4.7179E−02  −1.0375E−02 −6.3097E−02  A10 = −2.2968E−03−1.2927E−02 2.7307E−02  1.0794E−03 6.5118E−02 A12 =  4.5163E−04 3.5466E−03 −9.6095E−03  −1.8226E−03 −4.8355E−02  A14 = −3.5887E−05−4.0603E−04 6.9830E−04  8.3651E−04 1.4740E−02 Surface # 8 9 10 11 12 k = 0.0000E+00  0.0000E+00 −1.7707E+01  3.2297E+01 7.5739E+00 A4 =−5.6244E−02 −2.8896E−02 −1.6643E−01 −2.0600E−02 3.1120E−01 A6 = 9.1441E−02  7.2705E−02  1.1345E−01 −1.8363E−01 −9.8179E−01  A8 =−4.8442E−03 −3.0977E−02  3.4243E−02  3.9111E−01 1.3113E+00 A10 =−6.4169E−02 −2.2148E−02 −2.0102E−01 −3.9788E−01 −9.4369E−01  A12 = 4.0956E−02  1.6116E−02  1.8585E−01  1.8298E−01 3.7563E−01 A14 =−7.2519E−03 −3.5511E−03 −7.4357E−02 −3.3286E−02 −7.6535E−02  A16 = — — 1.1038E−02  9.9649E−04 6.1010E−03 Surface # 13 14 15 16 17 k =4.4512E+00 1.6420E+01 −1.3318E+00  0.0000E+00  5.5790E−01 A4 =3.0721E−01 1.4198E−02 −5.4244E−02 −1.5305E−01 −1.7101E−01 A6 =−9.5580E−01  −1.8360E−01   6.1368E−02  2.1608E−01  2.3063E−01 A8 =1.1580E+00 2.3441E−01 −1.6746E−01 −2.5954E−01 −1.7387E−01 A10 =−7.4071E−01  −1.6689E−01   2.0390E−01  2.0134E−01  8.2664E−02 A12 =2.6595E−01 6.8778E−02 −1.3491E−01 −1.0209E−01 −2.5556E−02 A14 =−5.0236E−02  −1.5419E−02   5.0577E−02  3.3223E−02  5.1504E−03 A16 =3.8393E−03 1.4511E−03 −1.0069E−02 −6.5329E−03 −6.5033E−04 A18 = — — 8.2886E−04  6.9828E−04  4.6476E−05 A20 = — — — −3.0997E−05 −1.4294E−06Surface # 18 19 20 k = −3.9132E+00 −1.5265E+01 −4.7672E+00 A4 =−1.0023E−01 −5.6010E−02 −3.2736E−02 A6 =  4.8726E−02  1.2793E−02 7.2151E−03 A8 = −9.0677E−03 −1.9254E−03 −1.0843E−03 A10 = −2.0182E−03 2.1611E−04  9.6135E−05 A12 =  1.9703E−03 −1.7214E−05 −4.2968E−06 A14 =−5.7877E−04  9.4184E−07 −2.6256E−09 A16 =  8.4738E−05 −3.4903E−08 9.7083E−09 A18 = −6.2339E−06  8.2794E−10 −4.0099E−10 A20 =  1.8361E−07−9.7308E−12  5.2589E−12

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, except for the Yc11 mentioned in this embodiment, thedefinitions of these parameters shown in the following table are thesame as those stated in the 1st and 2nd embodiments with correspondingvalues for the 3rd embodiment, so an explanation in this regard will notbe provided again.

Moreover, these parameters can be calculated from Table 5 and Table 6 asthe following values and satisfy the following conditions:

3rd Embodiment f [mm] 4.37 Yc11/Y11 0.54 Fno 1.90 R18/ImgH 0.19 HFOV[deg.] 50.3 TL/Y92 1.64 FOV [deg.] 100.6 Y92/BL 2.89 V1/N1 36.26 fG1/f2.10 V2/N2 30.89 f/fG2 0.17 V3/N3 19.11 f/fG3 0.46 V4/N4 36.26 f/f1−0.11 V5/N5 11.65 |f/f1| 0.11 V6/N6 11.65 f/f2 0.63 V7/N7 11.65 |f/f2|0.63 V8/N8 36.26 f/f3 −0.07 V9/N9 25.95 |f/f3| 0.07 Vmin 19.4 f/f4 0.91V40 4 |f/f4| 0.91 V30 3 f/f5 0.29 V20 3 |f/f5| 0.29 Sd/Td 0.77 f/f6−0.78 Td/ΣCT 1.32 |f/f6| 0.78 TL/ImgH 1.35 f/f7 −0.20 TL/EPD 3.06 |f/f7|0.20 TL/f 1.61 f/f8 1.93 TL/[ImgH × tan(CRA)] 2.12 |f/f8| 1.93 Y11/ImgH0.38 f/f9 −1.87 Ymax/Ymin 4.00 |f/f9| 1.87 f123/f 2.10 |f/R17| + |f/R18|5.26 f123/f456 0.96 NIF 28

4th Embodiment

FIG. 7 is a schematic view of an image capturing unit according to the4th embodiment of the present disclosure. FIG. 8 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 4thembodiment. In FIG. 7, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 499. The optical lens system includes, in order froman object side to an image side, a first lens element 410, an aperturestop 400, a second lens element 420, a third lens element 430, a fourthlens element 440, a fifth lens element 450, a sixth lens element 460, aseventh lens element 470, an eighth lens element 480, a ninth lenselement 490, a tenth lens element 493, an IR-cut filter 496 and an imagesurface 498. In addition, the optical lens system has a configuration ofa front lens group (the first lens element 410, the second lens element420 and the third lens element 430), a middle lens group (the fourthlens element 440, the fifth lens element 450, the sixth lens element 460and the seventh lens element 470) and a rear lens group (the eighth lenselement 480, the ninth lens element 490 and the tenth lens element 493).The optical lens system includes ten lens elements (410˜493) with noadditional lens element disposed between each of the adjacent ten lenselements.

The first lens element 410 with negative refractive power has anobject-side surface 411 being convex in a paraxial region thereof and animage-side surface 412 being concave in a paraxial region thereof. Thefirst lens element 410 is made of plastic material and has theobject-side surface 411 and the image-side surface 412 being bothaspheric.

The second lens element 420 with positive refractive power has anobject-side surface 421 being convex in a paraxial region thereof and animage-side surface 422 being concave in a paraxial region thereof. Thesecond lens element 420 is made of plastic material and has theobject-side surface 421 and the image-side surface 422 being bothaspheric. The image-side surface 422 of the second lens element 420 hasone inflection point.

The third lens element 430 with negative refractive power has anobject-side surface 431 being convex in a paraxial region thereof and animage-side surface 432 being concave in a paraxial region thereof. Thethird lens element 430 is made of plastic material and has theobject-side surface 431 and the image-side surface 432 being bothaspheric.

The fourth lens element 440 with negative refractive power has anobject-side surface 441 being convex in a paraxial region thereof and animage-side surface 442 being concave in a paraxial region thereof. Thefourth lens element 440 is made of plastic material and has theobject-side surface 441 and the image-side surface 442 being bothaspheric. The object-side surface 441 of the fourth lens element 440 hastwo inflection points. The image-side surface 442 of the fourth lenselement 440 has two inflection points.

The fifth lens element 450 with positive refractive power has anobject-side surface 451 being concave in a paraxial region thereof andan image-side surface 452 being convex in a paraxial region thereof. Thefifth lens element 450 is made of plastic material and has theobject-side surface 451 and the image-side surface 452 being bothaspheric. The object-side surface 451 of the fifth lens element 450 hasone inflection point.

The sixth lens element 460 with negative refractive power has anobject-side surface 461 being concave in a paraxial region thereof andan image-side surface 462 being convex in a paraxial region thereof. Thesixth lens element 460 is made of plastic material and has theobject-side surface 461 and the image-side surface 462 being bothaspheric. The object-side surface 461 of the sixth lens element 460 hastwo inflection points. The image-side surface 462 of the sixth lenselement 460 has one inflection point.

The seventh lens element 470 with positive refractive power has anobject-side surface 471 being convex in a paraxial region thereof and animage-side surface 472 being convex in a paraxial region thereof. Theseventh lens element 470 is made of plastic material and has theobject-side surface 471 and the image-side surface 472 being bothaspheric. The object-side surface 471 of the seventh lens element 470has two inflection points. The image-side surface 472 of the seventhlens element 470 has two inflection points.

The eighth lens element 480 with negative refractive power has anobject-side surface 481 being convex in a paraxial region thereof and animage-side surface 482 being concave in a paraxial region thereof. Theeighth lens element 480 is made of plastic material and has theobject-side surface 481 and the image-side surface 482 being bothaspheric. The object-side surface 481 of the eighth lens element 480 hastwo inflection points. The image-side surface 482 of the eighth lenselement 480 has two inflection points. The object-side surface 481 ofthe eighth lens element 480 has at least one critical point in anoff-axis region thereof. The image-side surface 482 of the eighth lenselement 480 has at least one critical point in an off-axis regionthereof.

The ninth lens element 490 with positive refractive power has anobject-side surface 491 being convex in a paraxial region thereof and animage-side surface 492 being concave in a paraxial region thereof. Theninth lens element 490 is made of plastic material and has theobject-side surface 491 and the image-side surface 492 being bothaspheric. The object-side surface 491 of the ninth lens element 490 hastwo inflection points. The image-side surface 492 of the ninth lenselement 490 has two inflection points. The object-side surface 491 ofthe ninth lens element 490 has at least one critical point in anoff-axis region thereof. The image-side surface 492 of the ninth lenselement 490 has at least one critical point in an off-axis regionthereof.

The tenth lens element 493 with negative refractive power has anobject-side surface 494 being concave in a paraxial region thereof andan image-side surface 495 being concave in a paraxial region thereof.The tenth lens element 493 is made of plastic material and has theobject-side surface 494 and the image-side surface 495 being bothaspheric. The object-side surface 494 of the tenth lens element 493 hasone inflection point. The image-side surface 495 of the tenth lenselement 493 has three inflection points. The object-side surface 494 ofthe tenth lens element 493 has at least one critical point in anoff-axis region thereof. The image-side surface 495 of the tenth lenselement 493 has at least one critical point in an off-axis regionthereof.

The IR-cut filter 496 is made of glass material and located between thetenth lens element 493 and the image surface 498, and will not affectthe focal length of the optical lens system. The image sensor 499 isdisposed on or near the image surface 498 of the optical lens system.

In the optical lens system of the 4th embodiment, when an Abbe number ofthe tenth lens element 493 is V10, and a refractive index of the tenthlens element 493 is N10, the following condition is satisfied:V10/N10=36.26.

When an axial distance between the object-side surface 411 of the firstlens element 410 and the image surface 498 is TL, and a maximumeffective radius of the image-side surface 492 of the ninth lens element490 is Y92, the following condition is satisfied: TL/Y92=2.30.

When the maximum effective radius of the image-side surface 492 of theninth lens element 490 is Y92, and an axial distance between theimage-side surface 495 of the tenth lens element 493 and the imagesurface 498 is BL, the following condition is satisfied: Y92/BL=4.52.

When a maximum effective radius of the image-side surface 495 of thetenth lens element 493 is Y102, and the axial distance between theimage-side surface 495 of the tenth lens element 493 and the imagesurface 498 is BL, the following condition is satisfied: Y102/BL=5.87.

When a vertical distance between the critical point on the image-sidesurface 492 of the ninth lens element 490 and the optical axis is Yc92,and a vertical distance between a critical point on the image-sidesurface 495 of the tenth lens element 493 and the optical axis is Yc102,the following condition is satisfied: Yc102/Yc92=0.80.

When a focal length of the optical lens system is f, and a focal lengthof the tenth lens element 493 is f10, the following condition issatisfied: f/f10=−1.18. Moreover, the following condition can also besatisfied: |f/f10|=1.18.

The detailed optical data of the 4th embodiment are shown in Table 7 andthe aspheric surface data are shown in Table 8 below.

TABLE 7 4th Embodiment f = 6.92 mm, Fno = 1.90, HFOV = 40.7 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 5.804 (ASP) 0.340 Plastic 1.698 16.3 −77.56 25.116 (ASP) 0.714 3 Ape. Stop Plano −0.664 4 Lens 2 2.668 (ASP) 0.960Plastic 1.544 56.0 5.83 5 14.739 (ASP) 0.052 6 Lens 3 11.579 (ASP) 0.300Plastic 1.632 23.4 −18.67 7 5.785 (ASP) 0.554 8 Lens 4 22.214 (ASP)0.320 Plastic 1.679 18.4 −68.78 9 14.967 (ASP) 0.090 10 Lens 5 −26.198(ASP) 0.456 Plastic 1.544 56.0 56.90 11 −14.277 (ASP) 0.050 12 Lens 6−13.221 (ASP) 0.336 Plastic 1.544 56.0 −230.67 13 −14.910 (ASP) 0.061 14Lens 7 25.075 (ASP) 0.488 Plastic 1.544 56.0 35.59 15 −84.415 (ASP)0.727 16 Lens 8 11.455 (ASP) 0.483 Plastic 1.566 37.4 −26.58 17 6.404(ASP) 0.197 18 Lens 9 2.672 (ASP) 0.595 Plastic 1.544 56.0 9.30 19 5.221(ASP) 1.286 20 Lens 10 −11.835 (ASP) 0.600 Plastic 1.544 56.0 −5.86 214.446 (ASP) 0.400 22 IR-cut Filter Plano 0.224 Glass 1.517 64.2 — 23Plano 0.223 24 Image Plano 0.000 Note: Reference wavelength is 587.6 nm(d-line). An effective radius of the image-side surface 442 (Surface 9)is 1.840 mm. An effective radius of the object-side surface 481 (Surface16) is 2.880 mm.

TABLE 8 Aspheric Coefficients Surface # 1 2 4 5 6 k = 0.0000E+000.0000E+00 −5.9430E−01 −9.9000E+01 2.9591E+01 A4 = 2.3116E−03 1.7773E−03 1.9916E−03 −1.3812E−02 −2.2832E−02  A6 = −5.3226E−04  −6.3132E−04  2.8058E−03  1.3767E−02 2.0383E−02 A8 = 5.9465E−05 1.1600E−04−2.0750E−03 −5.2656E−03 −9.1391E−03  A10 = −1.2959E−05  −3.9980E−05  1.1612E−03  7.2540E−04 2.2915E−03 A12 = 1.0253E−06 4.4559E−06−3.5204E−04  9.2161E−05 −2.4965E−04  A14 = — —  5.6453E−05 −3.8291E−059.1996E−06 A16 = — — −4.3988E−06  2.6164E−06 4.4867E−08 Surface # 7 8 910 11 k = 7.8245E+00 −9.9000E+01  2.5537E+01 7.0724E+00 0.0000E+00 A4 =−1.0574E−02  −2.5790E−02 −1.0209E−02 2.0760E−02 1.6339E−02 A6 =9.5190E−03 −1.5441E−03 −2.3560E−02 −3.2850E−02  −5.2186E−02  A8 =−5.7311E−03   2.2248E−03  2.9653E−02 3.6832E−02 7.9685E−02 A10 =2.2703E−03 −1.9584E−03 −2.4979E−02 −2.9761E−02  −6.8943E−02  A12 =−4.8411E−04   1.0015E−03  1.2569E−02 1.4315E−02 3.5732E−02 A14 =6.2907E−05 −1.9472E−04 −3.4972E−03 −3.8706E−03  −1.1240E−02  A16 = — 1.1509E−05  5.1034E−04 5.5089E−04 2.0956E−03 A18 = — — −3.1014E−05−3.2281E−05  −2.1226E−04  A20 = — — — 0.0000E+00 8.9387E−06 Surface # 1213 14 15 16 k =  0.0000E+00  3.6000E+01 7.2427E+01  0.0000E+00 1.1457E+01 A4 =  1.3474E−02  3.1888E−02 2.0976E−02 −4.4671E−03−1.6882E−04 A6 = −4.6993E−02 −5.2120E−02 −4.2634E−02  −3.2101E−03 2.0457E−03 A8 =  6.9915E−02  3.6698E−02 1.8290E−02 −5.2196E−03−4.5158E−03 A10 = −5.6023E−02 −1.2394E−02 8.6839E−04  5.5854E−03 2.2684E−03 A12 =  2.5088E−02 −8.0381E−04 −5.0707E−03  −2.6644E−03−6.4763E−04 A14 = −6.0816E−03  2.1544E−03 2.4128E−03  7.1343E−04 1.1250E−04 A16 =  6.6376E−04 −7.2762E−04 −5.2277E−04  −1.0684E−04−1.1735E−05 A18 = −2.1497E−06  1.0668E−04 5.5078E−05  8.3002E−06 6.7426E−07 A20 = −3.6439E−06 −5.9743E−06 −2.2856E−06  −2.6039E−07−1.6316E−08 Surface # 17 18 19 20 21 k = −2.0082E+01 −1.0553E+00−7.4031E+00  3.5331E+00 −4.4334E−01 A4 = −2.2377E−02 −2.6287E−02 1.9358E−02 −3.7321E−02 −3.6468E−02 A6 =  1.0414E−02  1.3096E−03−1.3864E−02  4.3071E−03  5.6082E−03 A8 = −5.1324E−03 −9.0966E−04 3.7053E−03 −2.1549E−04 −7.3519E−04 A10 =  1.6029E−03  3.8499E−04−6.4989E−04  2.2528E−05  7.0988E−05 A12 = −3.3026E−04 −9.1871E−05 7.5563E−05 −3.3830E−06 −4.6463E−06 A14 =  4.3506E−05  1.2430E−05−5.6923E−06  2.7952E−07  1.9688E−07 A16 = −3.4492E−06 −9.3070E−07 2.6635E−07 −1.2493E−08 −5.1459E−09 A18 =  1.4860E−07  3.6100E−08−6.9974E−09  2.9408E−10  7.5484E−11 A20 = −2.6619E−09 −5.6881E−10 7.8330E−11 −2.8987E−12 −4.7959E−13

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, except for the V10, N10, Y102, Yc102 and f10 mentionedin this embodiment, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 3rdembodiments with corresponding values for the 4th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 7 and Table 8 asthe following values and satisfy the following conditions:

4th Embodiment f [mm] 6.92 Y92/BL 4.52 Fno 1.90 Y102/BL 5.87 HFOV [deg.]40.7 Yc92/Yc82 1.35 FOV [deg.] 81.4 Yc102/Yc92 0.80 V1/N1 9.60 fG1/f1.29 V2/N2 36.26 f/fG2 −0.50 V3/N3 14.34 f/fG3 0.19 V4/N4 10.98 f/f1−0.09 V5/N5 36.26 |f/f1| 0.09 V6/N6 36.26 f/f2 1.19 V7/N7 36.26 |f/f2|1.19 V8/N8 23.91 f/f3 −0.37 V9/N9 36.26 |f/f3| 0.37 V10/N10 36.26 f/f4−0.10 Vmin 16.3 |f/f4| 0.10 V40 4 f/f5 0.12 V30 3 |f/f5| 0.12 V20 2 f/f6−0.03 Sd/Td 0.87 |f/f6| 0.03 Td/ΣCT 1.63 f/f7 0.19 TL/ImgH 1.46 |f/f7|0.19 TL/EPD 2.41 f/f8 −0.26 TL/f 1.27 |f/f8| 0.26 TL/[ImgH × tan(CRA)]2.21 f/f9 0.74 Y11/ImgH 0.37 |f/f9| 0.74 Ymax/Ymin 2.92 f/f10 −1.18f123/f 1.29 |f/f10| 1.18 f123/f456 −0.01 |f/R17| + |f/R18| 3.92 R18/ImgH0.87 NIF 25 TL/Y92 2.30 — —

5th Embodiment

FIG. 9 is a schematic view of an image capturing unit according to the5th embodiment of the present disclosure. FIG. 10 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 5thembodiment. In FIG. 9, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 599. The optical lens system includes, in order froman object side to an image side, an aperture stop 500, a first lenselement 510, a second lens element 520, a third lens element 530, a stop501, a fourth lens element 540, a fifth lens element 550, a sixth lenselement 560, a seventh lens element 570, an eighth lens element 580, aninth lens element 590, a tenth lens element 593, an IR-cut filter 596and an image surface 598. In addition, the optical lens system has aconfiguration of a front lens group (the first lens element 510, thesecond lens element 520 and the third lens element 530), a middle lensgroup (the fourth lens element 540, the fifth lens element 550, thesixth lens element 560 and the seventh lens element 570) and a rear lensgroup (the eighth lens element 580, the ninth lens element 590 and thetenth lens element 593). The optical lens system includes ten lenselements (510˜593) with no additional lens element disposed between eachof the adjacent ten lens elements.

The first lens element 510 with positive refractive power has anobject-side surface 511 being convex in a paraxial region thereof and animage-side surface 512 being concave in a paraxial region thereof. Thefirst lens element 510 is made of plastic material and has theobject-side surface 511 and the image-side surface 512 being bothaspheric. The object-side surface 511 of the first lens element 510 hasone inflection point. The image-side surface 512 of the first lenselement 510 has one inflection point.

The second lens element 520 with positive refractive power has anobject-side surface 521 being convex in a paraxial region thereof and animage-side surface 522 being concave in a paraxial region thereof. Thesecond lens element 520 is made of plastic material and has theobject-side surface 521 and the image-side surface 522 being bothaspheric. The image-side surface 522 of the second lens element 520 hastwo inflection points.

The third lens element 530 with negative refractive power has anobject-side surface 531 being convex in a paraxial region thereof and animage-side surface 532 being concave in a paraxial region thereof. Thethird lens element 530 is made of plastic material and has theobject-side surface 531 and the image-side surface 532 being bothaspheric. The object-side surface 531 of the third lens element 530 hastwo inflection points.

The fourth lens element 540 with negative refractive power has anobject-side surface 541 being convex in a paraxial region thereof and animage-side surface 542 being concave in a paraxial region thereof. Thefourth lens element 540 is made of plastic material and has theobject-side surface 541 and the image-side surface 542 being bothaspheric. The object-side surface 541 of the fourth lens element 540 hasone inflection point. The image-side surface 542 of the fourth lenselement 540 has two inflection points.

The fifth lens element 550 with positive refractive power has anobject-side surface 551 being concave in a paraxial region thereof andan image-side surface 552 being convex in a paraxial region thereof. Thefifth lens element 550 is made of plastic material and has theobject-side surface 551 and the image-side surface 552 being bothaspheric. The object-side surface 551 of the fifth lens element 550 hasthree inflection points.

The sixth lens element 560 with negative refractive power has anobject-side surface 561 being concave in a paraxial region thereof andan image-side surface 562 being convex in a paraxial region thereof. Thesixth lens element 560 is made of plastic material and has theobject-side surface 561 and the image-side surface 562 being bothaspheric. The image-side surface 562 of the sixth lens element 560 hasone inflection point.

The seventh lens element 570 with positive refractive power has anobject-side surface 571 being convex in a paraxial region thereof and animage-side surface 572 being convex in a paraxial region thereof. Theseventh lens element 570 is made of plastic material and has theobject-side surface 571 and the image-side surface 572 being bothaspheric. The object-side surface 571 of the seventh lens element 570has three inflection points. The image-side surface 572 of the seventhlens element 570 has three inflection points.

The eighth lens element 580 with negative refractive power has anobject-side surface 581 being convex in a paraxial region thereof and animage-side surface 582 being concave in a paraxial region thereof. Theeighth lens element 580 is made of plastic material and has theobject-side surface 581 and the image-side surface 582 being bothaspheric. The object-side surface 581 of the eighth lens element 580 hastwo inflection points. The image-side surface 582 of the eighth lenselement 580 has two inflection points. The object-side surface 581 ofthe eighth lens element 580 has at least one critical point in anoff-axis region thereof. The image-side surface 582 of the eighth lenselement 580 has at least one critical point in an off-axis regionthereof.

The ninth lens element 590 with positive refractive power has anobject-side surface 591 being convex in a paraxial region thereof and animage-side surface 592 being concave in a paraxial region thereof. Theninth lens element 590 is made of plastic material and has theobject-side surface 591 and the image-side surface 592 being bothaspheric. The object-side surface 591 of the ninth lens element 590 hastwo inflection points. The image-side surface 592 of the ninth lenselement 590 has two inflection points. The object-side surface 591 ofthe ninth lens element 590 has at least one critical point in anoff-axis region thereof. The image-side surface 592 of the ninth lenselement 590 has at least one critical point in an off-axis regionthereof.

The tenth lens element 593 with negative refractive power has anobject-side surface 594 being concave in a paraxial region thereof andan image-side surface 595 being concave in a paraxial region thereof.The tenth lens element 593 is made of plastic material and has theobject-side surface 594 and the image-side surface 595 being bothaspheric. The object-side surface 594 of the tenth lens element 593 hasone inflection point. The image-side surface 595 of the tenth lenselement 593 has two inflection points. The object-side surface 594 ofthe tenth lens element 593 has at least one critical point in anoff-axis region thereof. The image-side surface 595 of the tenth lenselement 593 has at least one critical point in an off-axis regionthereof.

The IR-cut filter 596 is made of glass material and located between thetenth lens element 593 and the image surface 598, and will not affectthe focal length of the optical lens system. The image sensor 599 isdisposed on or near the image surface 598 of the optical lens system.

The detailed optical data of the 5th embodiment are shown in Table 9 andthe aspheric surface data are shown in Table 10 below.

TABLE 9 5th Embodiment f = 6.48 mm, Fno = 1.73, HFOV = 43.5 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Ape. Stop Plano −0.528 2 Lens 1 3.231 (ASP) 0.333Plastic 1.553 47.4 37.28 3 3.690 (ASP) 0.051 4 Lens 2 3.654 (ASP) 0.938Plastic 1.544 55.9 7.04 5 72.560 (ASP) 0.030 6 Lens 3 38.009 (ASP) 0.301Plastic 1.620 22.1 −16.07 7 7.870 (ASP) 0.191 8 Stop Plano 0.237 9 Lens4 23.519 (ASP) 0.322 Plastic 1.652 19.1 −53.77 10 14.000 (ASP) 0.052 11Lens 5 −282.183 (ASP) 0.648 Plastic 1.544 55.9 19.16 12 −10.055 (ASP)0.069 13 Lens 6 −8.270 (ASP) 0.323 Plastic 1.548 49.5 −26.80 14 −19.189(ASP) 0.040 15 Lens 7 22.280 (ASP) 0.550 Plastic 1.544 55.9 23.18 16−28.759 (ASP) 0.506 17 Lens 8 95.919 (ASP) 0.449 Plastic 1.565 34.0−23.67 18 11.716 (ASP) 0.077 19 Lens 9 2.605 (ASP) 0.651 Plastic 1.54455.9 9.52 20 4.787 (ASP) 1.458 21 Lens 10 −8.922 (ASP) 0.500 Plastic1.544 55.9 −6.06 22 5.331 (ASP) 0.400 23 IR-cut Filter Plano 0.210 Glass1.517 64.2 — 24 Plano 0.156 25 Image Plano 0.000 Note: Referencewavelength is 587.6 nm (d-line). An effective radius of the stop 501(Surface 8) is 1.747 mm. An effective radius of the image-side surface542 (Surface 10) is 1.858 mm. An effective radius of the object-sidesurface 591 (Surface 19) is 3.650 mm.

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 6 k =  0.0000E+00 0.0000E+00 −5.5599E−01 −9.4677E+01 9.9000E+01 A4 = −9.6148E−04 1.1000E−03  3.9311E−03 −1.6633E−02 −1.7503E−02  A6 = −5.2582E−04−5.1250E−04 −1.1610E−03  9.9845E−03 1.1403E−02 A8 =  3.2245E−04 7.7047E−04  1.4692E−03  2.3866E−03 4.9620E−03 A10 = −1.2429E−04−8.6841E−05 −4.6584E−04 −5.6708E−03 −8.7207E−03  A12 =  1.2713E−06−2.9282E−05  1.1133E−04  2.8163E−03 4.2997E−03 A14 = — — −1.4341E−05−5.8923E−04 −9.3874E−04  A16 = — —  5.5094E−07  4.6298E−05 7.8904E−05Surface # 7 9 10 11 12 k =  5.8000E+00 −9.3436E+01  2.8710E+019.9000E+01  0.0000E+00 A4 = −1.0666E−02 −3.1433E−02 −7.9835E−031.8965E−02 −1.0506E−03 A6 =  4.5602E−03 −1.4753E−03 −2.5874E−02−2.9524E−02  −1.0634E−02 A8 = −1.0141E−03  9.5486E−05  3.1817E−023.4658E−02  2.3137E−02 A10 = −6.3281E−04  6.9924E−04 −2.5395E−02−2.8204E−02  −2.3435E−02 A12 =  2.9375E−04 −5.7856E−04  1.2187E−021.3510E−02  1.3202E−02 A14 = −2.6889E−05  2.4930E−04 −3.2588E−03−3.6461E−03  −4.4254E−03 A16 = — −3.7249E−05  4.5525E−04 5.1782E−04 8.8192E−04 A18 = — — −2.6320E−05 −3.0237E−05  −9.7019E−05 A20 = — — — — 4.5535E−06 Surface # 13 14 15 16 17 k = −1.2230E+01 3.4648E+01 3.8332E+01 −1.0000E+00 9.1532E+01 A4 =  2.4890E−04 3.3679E−02 2.3511E−02 −2.5420E−03 3.7359E−02 A6 = −6.0502E−03 −6.3170E−02 −5.0265E−02 −6.6426E−03 −2.4266E−02  A8 =  1.5382E−02 5.1623E−02 3.0301E−02 −1.1550E−03 3.8397E−03 A10 = −1.5221E−02 −2.6277E−02 −8.8556E−03  3.3808E−03 1.2409E−03 A12 =  7.3944E−03 7.6373E−03−3.6833E−04 −1.9736E−03 −8.4900E−04  A14 = −1.8603E−03 −1.0832E−03  1.0002E−03  5.8231E−04 2.1396E−04 A16 =  2.0918E−04 1.6885E−05−2.7007E−04 −9.3250E−05 −2.8686E−05  A18 = −1.9830E−06 1.3495E−05 3.0704E−05  7.6953E−06 2.0061E−06 A20 = −9.7698E−07 −1.1256E−06 −1.3160E−06 −2.5623E−07 −5.7137E−08  Surface # 18 19 20 21 22 k =−7.7786E+00 −1.1031E+00 −9.8973E+00  1.3192E+00 −5.9689E−01 A4 = 1.8270E−02 −3.1780E−02  4.5688E−03 −3.3054E−02 −2.4788E−02 A6 =−2.2166E−02 −2.8956E−03 −9.8562E−03 −5.1413E−04  1.4625E−03 A8 = 8.2314E−03  2.2804E−03  3.1152E−03  1.0738E−03  1.2944E−04 A10 =−1.9400E−03 −5.3913E−04 −5.6029E−04 −1.4471E−04 −3.2090E−05 A12 = 2.9045E−04  6.4959E−05  6.2557E−05  9.2679E−06  2.8216E−06 A14 =−2.6351E−05 −4.1826E−06 −4.3832E−06 −3.1459E−07 −1.4001E−07 A16 = 1.3693E−06  1.3726E−07  1.8783E−07  4.8493E−09  4.0932E−09 A18 =−3.6185E−08 −1.7912E−09 −4.5040E−09  5.5135E−14 −6.5465E−11 A20 = 3.4851E−10 −8.8137E−13  4.6340E−11 −6.3217E−13  4.4173E−13

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 4thembodiments with corresponding values for the 5th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 9 and Table 10as the following values and satisfy the following conditions:

5th Embodiment f [mm] 6.48 Y92/BL 5.31 Fno 1.73 Y102/BL 6.47 HFOV [deg.]43.5 Yc92/Yc82 1.32 FOV [deg.] 87.0 Yc102/Yc92 0.85 V1/N1 30.52 fG1/f1.37 V2/N2 36.23 f/fG2 −3.19 V3/N3 13.64 f/fG3 0.26 V4/N4 11.56 f/f10.17 V5/N5 36.23 |f/f1| 0.17 V6/N6 31.98 f/f2 0.92 V7/N7 36.23 |f/f2|0.92 V8/N8 21.72 f/f3 −0.40 V9/N9 36.23 |f/f3| 0.40 V10/N10 36.23 f/f4−0.12 Vmin 19.1 |f/f4| 0.12 V40 3 f/f5 0.34 V30 2 |f/f5| 0.34 V20 1 f/f6−0.24 Sd/Td 0.93 |f/f6| 0.24 Td/ΣCT 1.54 f/f7 0.28 TL/ImgH 1.41 |f/f7|0.28 TL/EPD 2.27 f/f8 −0.27 TL/f 1.31 |f/f8| 0.27 TL/[ImgH × tan(CRA)]2.33 f/f9 0.68 Y11/ImgH 0.31 |f/f9| 0.68 Ymax/Ymin 2.85 f/f10 −1.07f123/f 1.37 |f/f10| 1.07 f123/f456 −0.03 |f/R17| + |f/R18| 3.84 R18/ImgH0.80 NIF 30 TL/Y92 2.09 — —

6th Embodiment

FIG. 11 is a schematic view of an image capturing unit according to the6th embodiment of the present disclosure. FIG. 12 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 6thembodiment. In FIG. 11, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 699. The optical lens system includes, in order froman object side to an image side, a first lens element 610, a stop 601, asecond lens element 620, an aperture stop 600, a third lens element 630,a fourth lens element 640, a stop 602, a fifth lens element 650, a sixthlens element 660, a seventh lens element 670, an eighth lens element680, a ninth lens element 690, an IR-cut filter 696 and an image surface698. In addition, the optical lens system has a configuration of a frontlens group (the first lens element 610, the second lens element 620 andthe third lens element 630), a middle lens group (the fourth lenselement 640, the fifth lens element 650 and the sixth lens element 660)and a rear lens group (the seventh lens element 670, the eighth lenselement 680 and the ninth lens element 690). The optical lens systemincludes nine lens elements (610˜690) with no additional lens elementdisposed between each of the adjacent nine lens elements.

The first lens element 610 with negative refractive power has anobject-side surface 611 being concave in a paraxial region thereof andan image-side surface 612 being convex in a paraxial region thereof. Thefirst lens element 610 is made of plastic material and has theobject-side surface 611 and the image-side surface 612 being bothaspheric. The object-side surface 611 of the first lens element 610 hasone inflection point. The image-side surface 612 of the first lenselement 610 has two inflection points. The object-side surface 611 ofthe first lens element 610 has at least one convex critical point in anoff-axis region thereof.

The second lens element 620 with positive refractive power has anobject-side surface 621 being convex in a paraxial region thereof and animage-side surface 622 being concave in a paraxial region thereof. Thesecond lens element 620 is made of plastic material and has theobject-side surface 621 and the image-side surface 622 being bothaspheric. The object-side surface 621 of the second lens element 620 hasone inflection point. The image-side surface 622 of the second lenselement 620 has one inflection point.

The third lens element 630 with negative refractive power has anobject-side surface 631 being concave in a paraxial region thereof andan image-side surface 632 being concave in a paraxial region thereof.The third lens element 630 is made of plastic material and has theobject-side surface 631 and the image-side surface 632 being bothaspheric. The image-side surface 632 of the third lens element 630 hasthree inflection points.

The fourth lens element 640 with positive refractive power has anobject-side surface 641 being concave in a paraxial region thereof andan image-side surface 642 being convex in a paraxial region thereof. Thefourth lens element 640 is made of plastic material and has theobject-side surface 641 and the image-side surface 642 being bothaspheric. The object-side surface 641 of the fourth lens element 640 hastwo inflection points.

The fifth lens element 650 with positive refractive power has anobject-side surface 651 being concave in a paraxial region thereof andan image-side surface 652 being convex in a paraxial region thereof. Thefifth lens element 650 is made of plastic material and has theobject-side surface 651 and the image-side surface 652 being bothaspheric. The image-side surface 652 of the fifth lens element 650 hasthree inflection points.

The sixth lens element 660 with negative refractive power has anobject-side surface 661 being concave in a paraxial region thereof andan image-side surface 662 being concave in a paraxial region thereof.The sixth lens element 660 is made of plastic material and has theobject-side surface 661 and the image-side surface 662 being bothaspheric. The object-side surface 661 of the sixth lens element 660 hasone inflection point. The image-side surface 662 of the sixth lenselement 660 has one inflection point.

The seventh lens element 670 with negative refractive power has anobject-side surface 671 being concave in a paraxial region thereof andan image-side surface 672 being convex in a paraxial region thereof. Theseventh lens element 670 is made of plastic material and has theobject-side surface 671 and the image-side surface 672 being bothaspheric. The object-side surface 671 of the seventh lens element 670has two inflection points. The image-side surface 672 of the seventhlens element 670 has one inflection point.

The eighth lens element 680 with positive refractive power has anobject-side surface 681 being concave in a paraxial region thereof andan image-side surface 682 being convex in a paraxial region thereof. Theeighth lens element 680 is made of plastic material and has theobject-side surface 681 and the image-side surface 682 being bothaspheric. The object-side surface 681 of the eighth lens element 680 hasone inflection point. The image-side surface 682 of the eighth lenselement 680 has two inflection points.

The ninth lens element 690 with negative refractive power has anobject-side surface 691 being convex in a paraxial region thereof and animage-side surface 692 being concave in a paraxial region thereof. Theninth lens element 690 is made of plastic material and has theobject-side surface 691 and the image-side surface 692 being bothaspheric. The object-side surface 691 of the ninth lens element 690 hastwo inflection points. The image-side surface 692 of the ninth lenselement 690 has two inflection points. The object-side surface 691 ofthe ninth lens element 690 has at least one critical point in anoff-axis region thereof. The image-side surface 692 of the ninth lenselement 690 has at least one critical point in an off-axis regionthereof.

The IR-cut filter 696 is made of glass material and located between theninth lens element 690 and the image surface 698, and will not affectthe focal length of the optical lens system. The image sensor 699 isdisposed on or near the image surface 698 of the optical lens system.

The detailed optical data of the 6th embodiment are shown in Table 11and the aspheric surface data are shown in Table 12 below.

TABLE 11 6th Embodiment f = 4.37 mm, Fno = 1.90, HFOV = 50.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −3.399 (ASP) 0.354 Plastic 1.544 56.0−49.72 2 −4.030 (ASP) 0.418 3 Stop Plano −0.376 4 Lens 2 1.831 (ASP)0.573 Plastic 1.562 43.2 7.80 5 2.790 (ASP) 0.362 6 Ape. Stop Plano0.071 7 Lens 3 −138.708 (ASP) 0.261 Plastic 1.562 43.2 −143.75 8 193.583(ASP) 0.061 9 Lens 4 −27.403 (ASP) 0.757 Plastic 1.544 56.0 4.93 10−2.467 (ASP) −0.388 11 Stop Plano 0.418 12 Lens 5 −24.338 (ASP) 0.250Plastic 1.705 14.0 14.48 13 −7.223 (ASP) 0.060 14 Lens 6 −6.777 (ASP)0.252 Plastic 1.672 15.8 −5.71 15 8.983 (ASP) 0.635 16 Lens 7 −3.768(ASP) 0.364 Plastic 1.669 19.4 −40.13 17 −4.553 (ASP) 0.095 18 Lens 8−4.045 (ASP) 0.700 Plastic 1.544 56.0 4.94 19 −1.713 (ASP) 0.245 20 Lens9 1.886 (ASP) 0.554 Plastic 1.559 40.4 −5.74 21 1.062 (ASP) 0.800 22IR-cut Filter Plano 0.210 Glass 1.517 64.2 — 23 Plano 0.247 24 ImagePlano 0.000 Note: Reference wavelength is 587.6 nm (d-line). Aneffective radius of the stop 601 (Surface 3) is 1.500 mm. An effectiveradius of the stop 602 (Surface 11) is 1.320 mm. An effective radius ofthe image-side surface 662 (Surface 15) is 1.641 mm.

TABLE 12 Aspheric Coefficients Surface # 1 2 4 5 7 k = −3.1763E+01−1.8678E+01 3.5714E−01 −1.2827E+01 0.0000E+00 A4 =  3.7244E−02 8.5518E−02 −5.7941E−02  −8.7577E−03 −5.9168E−02  A6 = −1.0429E−02−8.5860E−02 1.2295E−02 −2.4800E−02 6.0477E−02 A8 =  1.4093E−02 1.3572E−01 3.0304E−03  1.9599E−01 −7.2738E−02  A10 = −1.2511E−02−1.4523E−01 −1.1473E−02  −5.7863E−01 8.2985E−02 A12 =  6.9838E−03 1.0341E−01 5.5832E−03  9.2493E−01 −6.4699E−02  A14 = −2.4133E−03−4.7587E−02 −1.5189E−03  −8.7802E−01 1.9029E−02 A16 =  5.0284E−04 1.3558E−02 —  4.9042E−01 — A18 = −5.7461E−05 −2.1599E−03 — −1.4885E−01— A20 =  2.7400E−06  1.4574E−04 —  1.8947E−02 — Surface # 8 9 10 12 13 k=  0.0000E+00 0.0000E+00 −1.4519E+01 −8.9940E+01 1.7196E+00 A4 =−6.5746E−02 −3.0706E−02  −1.5548E−01  1.8748E−02 3.1780E−01 A6 = 1.0890E−01 4.4469E−02  3.1139E−02 −3.4907E−01 −1.0554E+00  A8 =−2.6873E−02 4.8744E−02  2.1105E−01  7.0875E−01 1.4795E+00 A10 =−4.1010E−02 −1.2363E−01  −4.0610E−01 −7.5096E−01 −1.1411E+00  A12 = 3.0209E−02 8.5100E−02  3.2311E−01  4.1421E−01 5.0024E−01 A14 =−7.5845E−03 −2.2913E−02  −1.2311E−01 −1.1589E−01 −1.1651E−01  A16 = — — 1.8222E−02  1.3263E−02 1.1210E−02 Surface # 14 15 16 17 18 k =7.6506E+00  1.4595E+01 −3.6230E+00  0.0000E+00  4.5225E−01 A4 =2.8406E−01  4.2408E−03 −6.0345E−02 −1.4703E−01 −1.2865E−01 A6 =−9.5695E−01  −1.8903E−01  6.7894E−02  1.9098E−01  1.1341E−01 A8 =1.1955E+00  2.5915E−01 −1.3499E−01 −2.4743E−01 −3.8812E−02 A10 =−7.8902E−01  −2.0146E−01  1.3505E−01  2.1899E−01 −2.8531E−03 A12 =2.9815E−01  9.7161E−02 −7.5687E−02 −1.2598E−01  6.7853E−03 A14 =−6.1047E−02  −2.8924E−02  2.4244E−02  4.5603E−02 −2.3287E−03 A16 =5.2597E−03  4.8481E−03 −4.0912E−03 −9.8514E−03  3.8560E−04 A18 = —−3.3532E−04  2.8001E−04  1.1543E−03 −3.2398E−05 A20 = — −3.3938E−06 —−5.6441E−05  1.1066E−06 Surface # 19 20 21 k = −4.5773E+00 −1.5742E+01−3.8031E+00 A4 = −1.4972E−01 −7.1715E−02 −4.9895E−02 A6 =  1.2736E−01 1.5729E−02  1.2417E−02 A8 = −6.5458E−02 −1.5654E−03 −2.0414E−03 A10 = 2.2466E−02  1.6687E−06  2.1392E−04 A12 = −4.9016E−03  1.9655E−05−1.4114E−05 A14 =  6.6257E−04 −2.4667E−06  5.4116E−07 A16 = −5.3615E−05 1.4721E−07 −9.3316E−09 A18 =  2.3805E−06 −4.4777E−09 −2.3253E−11 A20 =−4.4850E−08  5.5706E−11  2.0650E−12

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 5thembodiments with corresponding values for the 6th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 11 and Table 12as the following values and satisfy the following conditions:

6th Embodiment f [mm] 4.37 Yc11/Y11 0.52 Fno 1.90 R18/ImgH 0.20 HFOV[deg.] 50.0 TL/Y92 1.70 FOV [deg.] 100.0 Y92/BL 2.88 V1/N1 36.26 fG1/f2.17 V2/N2 27.66 f/fG2 0.17 V3/N3 27.66 f/fG3 0.45 V4/N4 36.26 f/f1−0.09 V5/N5 8.21 |f/f1| 0.09 V6/N6 9.44 f/f2 0.56 V7/N7 11.65 |f/f2|0.56 V8/N8 36.26 f/f3 −0.03 V9/N9 25.95 |f/f3| 0.03 Vmin 14.0 f/f4 0.89V40 3 |f/f4| 0.89 V30 3 f/f5 0.30 V20 3 |f/f5| 0.30 Sd/Td 0.77 f/f6−0.77 Td/ΣCT 1.39 |f/f6| 0.77 TL/ImgH 1.37 f/f7 −0.11 TL/EPD 3.10 |f/f7|0.11 TL/f 1.63 f/f8 0.89 TL/[ImgH × tan(CRA)] 2.17 |f/f8| 0.89 Y11/ImgH0.39 f/f9 −0.76 Ymax/Ymin 3.93 |f/f9| 0.76 f123/f 2.17 |f/R17| + |f/R18|6.43 f123/f456 0.98 NIF 25

7th Embodiment

FIG. 13 is a schematic view of an image capturing unit according to the7th embodiment of the present disclosure. FIG. 14 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 7thembodiment. In FIG. 13, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 799. The optical lens system includes, in order froman object side to an image side, a first lens element 710, a second lenselement 720, an aperture stop 700, a third lens element 730, a fourthlens element 740, a fifth lens element 750, a sixth lens element 760, aseventh lens element 770, an eighth lens element 780, a ninth lenselement 790, an IR-cut filter 796 and an image surface 798. In addition,the optical lens system has a configuration of a front lens group (thefirst lens element 710, the second lens element 720 and the third lenselement 730), a middle lens group (the fourth lens element 740, thefifth lens element 750 and the sixth lens element 760) and a rear lensgroup (the seventh lens element 770, the eighth lens element 780 and theninth lens element 790). The optical lens system includes nine lenselements (710˜790) with no additional lens element disposed between eachof the adjacent nine lens elements.

The first lens element 710 with negative refractive power has anobject-side surface 711 being concave in a paraxial region thereof andan image-side surface 712 being concave in a paraxial region thereof.The first lens element 710 is made of plastic material and has theobject-side surface 711 and the image-side surface 712 being bothaspheric. The object-side surface 711 of the first lens element 710 hasone inflection point. The object-side surface 711 of the first lenselement 710 has at least one convex critical point in an off-axis regionthereof.

The second lens element 720 with positive refractive power has anobject-side surface 721 being convex in a paraxial region thereof and animage-side surface 722 being concave in a paraxial region thereof. Thesecond lens element 720 is made of plastic material and has theobject-side surface 721 and the image-side surface 722 being bothaspheric. The object-side surface 721 of the second lens element 720 hasone inflection point.

The third lens element 730 with positive refractive power has anobject-side surface 731 being convex in a paraxial region thereof and animage-side surface 732 being convex in a paraxial region thereof. Thethird lens element 730 is made of plastic material and has theobject-side surface 731 and the image-side surface 732 being bothaspheric.

The fourth lens element 740 with positive refractive power has anobject-side surface 741 being concave in a paraxial region thereof andan image-side surface 742 being convex in a paraxial region thereof. Thefourth lens element 740 is made of plastic material and has theobject-side surface 741 and the image-side surface 742 being bothaspheric. The object-side surface 741 of the fourth lens element 740 hasone inflection point. The image-side surface 742 of the fourth lenselement 740 has one inflection point.

The fifth lens element 750 with positive refractive power has anobject-side surface 751 being concave in a paraxial region thereof andan image-side surface 752 being convex in a paraxial region thereof. Thefifth lens element 750 is made of plastic material and has theobject-side surface 751 and the image-side surface 752 being bothaspheric. The object-side surface 751 of the fifth lens element 750 hasone inflection point.

The sixth lens element 760 with positive refractive power has anobject-side surface 761 being convex in a paraxial region thereof and animage-side surface 762 being convex in a paraxial region thereof. Thesixth lens element 760 is made of plastic material and has theobject-side surface 761 and the image-side surface 762 being bothaspheric. The object-side surface 761 of the sixth lens element 760 hastwo inflection points. The image-side surface 762 of the sixth lenselement 760 has one inflection point.

The seventh lens element 770 with negative refractive power has anobject-side surface 771 being concave in a paraxial region thereof andan image-side surface 772 being convex in a paraxial region thereof. Theseventh lens element 770 is made of plastic material and has theobject-side surface 771 and the image-side surface 772 being bothaspheric. The image-side surface 772 of the seventh lens element 770 hastwo inflection points.

The eighth lens element 780 with positive refractive power has anobject-side surface 781 being convex in a paraxial region thereof and animage-side surface 782 being convex in a paraxial region thereof. Theeighth lens element 780 is made of plastic material and has theobject-side surface 781 and the image-side surface 782 being bothaspheric. The object-side surface 781 of the eighth lens element 780 hastwo inflection points. The image-side surface 782 of the eighth lenselement 780 has two inflection points. The object-side surface 781 ofthe eighth lens element 780 has at least one critical point in anoff-axis region thereof. The image-side surface 782 of the eighth lenselement 780 has at least one critical point in an off-axis regionthereof.

The ninth lens element 790 with positive refractive power has anobject-side surface 791 being convex in a paraxial region thereof and animage-side surface 792 being concave in a paraxial region thereof. Theninth lens element 790 is made of plastic material and has theobject-side surface 791 and the image-side surface 792 being bothaspheric. The object-side surface 791 of the ninth lens element 790 hasone inflection point. The image-side surface 792 of the ninth lenselement 790 has one inflection point. The object-side surface 791 of theninth lens element 790 has at least one critical point in an off-axisregion thereof. The image-side surface 792 of the ninth lens element 790has at least one critical point in an off-axis region thereof.

The IR-cut filter 796 is made of glass material and located between theninth lens element 790 and the image surface 798, and will not affectthe focal length of the optical lens system. The image sensor 799 isdisposed on or near the image surface 798 of the optical lens system.

The detailed optical data of the 7th embodiment are shown in Table 13and the aspheric surface data are shown in Table 14 below.

TABLE 13 7th Embodiment f = 1.94 mm, Fno = 1.80, HFOV = 61.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −9.253 (ASP) 0.300 Plastic 1.515 56.4−2.60 2 1.585 (ASP) 0.340 3 Lens 2 1.416 (ASP) 0.417 Plastic 1.603 28.54.83 4 2.449 (ASP) 0.428 5 Ape. Stop Plano −0.050 6 Lens 3 4.816 (ASP)0.383 Plastic 1.561 44.9 6.68 7 −16.463 (ASP) 0.026 8 Lens 4 −34.681(ASP) 0.253 Plastic 1.705 14.0 21.68 9 −10.642 (ASP) 0.043 10 Lens 5−12.975 (ASP) 0.587 Plastic 1.544 55.9 9.75 11 −3.823 (ASP) 0.029 12Lens 6 13.918 (ASP) 0.581 Plastic 1.544 55.9 5.14 13 −3.442 (ASP) 0.13814 Lens 7 −1.019 (ASP) 0.270 Plastic 1.705 14.0 −2.63 15 −2.508 (ASP)0.025 16 Lens 8 1.721 (ASP) 0.550 Plastic 1.544 55.9 2.68 17 −8.460(ASP) 0.025 18 Lens 9 0.961 (ASP) 0.420 Plastic 1.686 18.4 22.10 190.844 (ASP) 0.900 20 IR-cut Filter Plano 0.210 Glass 1.517 64.2 — 21Plano 0.326 22 Image Plano 0.000 Note: Reference wavelength is 587.6 nm(d-line). An effective radius of the image-side surface 752 (Surface 11)is 1.641 mm.

TABLE 14 Aspheric Coefficients Surface # 1 2 3 4 6 k = −9.9000E+01−1.1771E+00 −1.3175E−01 1.2504E+00 1.0644E+01 A4 =  4.5384E−02−7.1232E−02 −6.1680E−02 1.7384E−01 2.2696E−02 A6 = −1.3036E−02 5.4256E−02  4.8706E−02 1.2218E−01 2.4872E−01 A8 =  2.2684E−03−3.1587E−02  3.0972E−02 1.6907E−01 −8.0017E−01  A10 =  5.7127E−05 1.0229E−02  3.5091E−02 1.3801E−01 1.4222E+00 A12 = −9.5168E−05−1.1484E−03 −4.5936E−02 1.2989E−01 −9.5420E−01  A14 =  1.5751E−05 — — —— A16 = −8.6958E−07 — — — — Surface # 7 8 9 10 11 k = −1.3209E+02−9.0000E+01 1.1011E+01 −9.0000E+01 −8.3462E+01 A4 = −3.7929E−03−8.0903E−03 5.8780E−04  9.3497E−03 −4.3391E−01 A6 = −2.5504E−02−9.9521E−03 2.5898E−02 −1.3547E−03  4.4622E−01 A8 = −2.1902E−02−7.3864E−04 2.1032E−02  1.1352E−02 −4.8801E−01 A10 = −4.6500E−02 3.7562E−02 1.5374E−02  1.4705E−02  3.4653E−01 A12 =  1.1864E−01 3.1735E−02 2.4543E−02 −4.7343E−03 −9.8873E−02 Surface # 12 13 14 15 16k = −9.0000E+01 −6.0303E+00 −2.4609E+00 9.4936E−01 −4.2285E+00 A4 =−3.0722E−01 −2.2022E−01 −1.0153E−01 −2.3031E−01   4.9015E−02 A6 = 2.4243E−01 −1.6193E−01 −9.1813E−03 4.2617E−01 −1.6168E−02 A8 =−3.4992E−01  6.5946E−01  6.2771E−01 −2.6914E−01  −3.0452E−02 A10 = 2.6155E−01 −8.6722E−01 −1.0588E+00 6.2959E−02  1.9657E−02 A12 = 1.5498E−02  5.1168E−01  7.0239E−01 1.0890E−02 −5.2042E−03 A14 =−1.6935E−01 −1.3786E−01 −1.9386E−01 −7.7969E−03   6.8256E−04 A16 = 8.2569E−02  1.5680E−02  1.5224E−02 1.0161E−03 −3.6504E−05 Surface # 1718 19 k = −3.5452E+01 −1.4298E+00 −3.0786E+00 A4 =  3.9169E−01−3.0486E−01 −1.1820E−01 A6 = −3.2789E−01  1.9978E−01  4.0393E−02 A8 = 1.3475E−01 −1.3080E−01 −5.1519E−03 A10 = −3.1783E−02  7.1937E−02−2.9329E−05 A12 =  4.2553E−03 −2.6665E−02 −6.9599E−05 A14 = −2.9887E−04 6.2276E−03  5.4905E−05 A16 =  8.5544E−06 −8.8334E−04 −1.0440E−05 A18 =—  6.9623E−05  8.4381E−07 A20 = — −2.3386E−06 −2.5619E−08

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 6thembodiments with corresponding values for the 7th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 13 and Table 14as the following values and satisfy the following conditions:

7th Embodiment f [mm] 1.94 R18/ImgH 0.26 Fno 1.80 TL/Y92 2.34 HFOV[deg.] 61.0 Y92/BL 1.84 FOV [deg.] 122.0 Yc92/Yc82 1.28 V1/N1 37.25fG1/f 95.65 V2/N2 17.78 f/fG2 0.21 V3/N3 28.76 f/fG3 0.64 V4/N4 8.21f/f1 −0.75 V5/N5 36.23 |f/f1| 0.75 V6/N6 36.23 f/f2 0.40 V7/N7 8.21|f/f2| 0.40 V8/N8 36.23 f/f3 0.29 V9/N9 10.91 |f/f3| 0.29 Vmin 14.0 f/f40.09 V40 4 |f/f4| 0.09 V30 4 f/f5 0.20 V20 3 |f/f5| 0.20 Sd/Td 0.69 f/f60.38 Td/ΣCT 1.27 |f/f6| 0.38 TL/ImgH 1.91 f/f7 −0.74 TL/EPD 5.75 |f/f7|0.74 TL/f 3.20 f/f8 0.72 TL/[ImgH × tan(CRA)] 2.66 |f/f8| 0.72 Y11/ImgH0.68 f/f9 0.09 Ymax/Ymin 4.02 |f/f9| 0.09 f123/f 95.65 |f/R17| + |f/R18|4.32 f123/f456 61.49 NIF 16 Yc11/Y11 0.35 — —

8th Embodiment

FIG. 15 is a schematic view of an image capturing unit according to the8th embodiment of the present disclosure. FIG. 16 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 8thembodiment. In FIG. 15, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 899. The optical lens system includes, in order froman object side to an image side, a first lens element 810, a stop 801, asecond lens element 820, an aperture stop 800, a third lens element 830,a fourth lens element 840, a fifth lens element 850, a sixth lenselement 860, a seventh lens element 870, an eighth lens element 880, aninth lens element 890, an IR-cut filter 896 and an image surface 898.In addition, the optical lens system has a configuration of a front lensgroup (the first lens element 810, the second lens element 820 and thethird lens element 830), a middle lens group (the fourth lens element840, the fifth lens element 850 and the sixth lens element 860) and arear lens group (the seventh lens element 870, the eighth lens element880 and the ninth lens element 890). The optical lens system includesnine lens elements (810˜890) with no additional lens element disposedbetween each of the adjacent nine lens elements.

The first lens element 810 with negative refractive power has anobject-side surface 811 being concave in a paraxial region thereof andan image-side surface 812 being concave in a paraxial region thereof.The first lens element 810 is made of plastic material and has theobject-side surface 811 and the image-side surface 812 being bothaspheric. The object-side surface 811 of the first lens element 810 hasone inflection point. The object-side surface 811 of the first lenselement 810 has at least one convex critical point in an off-axis regionthereof.

The second lens element 820 with positive refractive power has anobject-side surface 821 being convex in a paraxial region thereof and animage-side surface 822 being concave in a paraxial region thereof. Thesecond lens element 820 is made of plastic material and has theobject-side surface 821 and the image-side surface 822 being bothaspheric. The object-side surface 821 of the second lens element 820 hasone inflection point.

The third lens element 830 with positive refractive power has anobject-side surface 831 being convex in a paraxial region thereof and animage-side surface 832 being convex in a paraxial region thereof. Thethird lens element 830 is made of plastic material and has theobject-side surface 831 and the image-side surface 832 being bothaspheric. The image-side surface 832 of the third lens element 830 hasone inflection point.

The fourth lens element 840 with positive refractive power has anobject-side surface 841 being convex in a paraxial region thereof and animage-side surface 842 being concave in a paraxial region thereof. Thefourth lens element 840 is made of plastic material and has theobject-side surface 841 and the image-side surface 842 being bothaspheric.

The fifth lens element 850 with positive refractive power has anobject-side surface 851 being convex in a paraxial region thereof and animage-side surface 852 being convex in a paraxial region thereof. Thefifth lens element 850 is made of plastic material and has theobject-side surface 851 and the image-side surface 852 being bothaspheric.

The sixth lens element 860 with positive refractive power has anobject-side surface 861 being convex in a paraxial region thereof and animage-side surface 862 being convex in a paraxial region thereof. Thesixth lens element 860 is made of plastic material and has theobject-side surface 861 and the image-side surface 862 being bothaspheric. The object-side surface 861 of the sixth lens element 860 hastwo inflection points. The image-side surface 862 of the sixth lenselement 860 has one inflection point.

The seventh lens element 870 with negative refractive power has anobject-side surface 871 being concave in a paraxial region thereof andan image-side surface 872 being convex in a paraxial region thereof. Theseventh lens element 870 is made of plastic material and has theobject-side surface 871 and the image-side surface 872 being bothaspheric. The image-side surface 872 of the seventh lens element 870 hastwo inflection points.

The eighth lens element 880 with positive refractive power has anobject-side surface 881 being convex in a paraxial region thereof and animage-side surface 882 being convex in a paraxial region thereof. Theeighth lens element 880 is made of plastic material and has theobject-side surface 881 and the image-side surface 882 being bothaspheric. The object-side surface 881 of the eighth lens element 880 hasone inflection point. The image-side surface 882 of the eighth lenselement 880 has two inflection points. The object-side surface 881 ofthe eighth lens element 880 has at least one critical point in anoff-axis region thereof. The image-side surface 882 of the eighth lenselement 880 has at least one critical point in an off-axis regionthereof.

The ninth lens element 890 with positive refractive power has anobject-side surface 891 being convex in a paraxial region thereof and animage-side surface 892 being concave in a paraxial region thereof. Theninth lens element 890 is made of plastic material and has theobject-side surface 891 and the image-side surface 892 being bothaspheric. The object-side surface 891 of the ninth lens element 890 hasthree inflection points. The image-side surface 892 of the ninth lenselement 890 has one inflection point. The object-side surface 891 of theninth lens element 890 has at least one critical point in an off-axisregion thereof. The image-side surface 892 of the ninth lens element 890has at least one critical point in an off-axis region thereof.

The IR-cut filter 896 is made of glass material and located between theninth lens element 890 and the image surface 898, and will not affectthe focal length of the optical lens system. The image sensor 899 isdisposed on or near the image surface 898 of the optical lens system.

The detailed optical data of the 8th embodiment are shown in Table 15and the aspheric surface data are shown in Table 16 below.

TABLE 15 8th Embodiment f = 1.84 mm, Fno = 1.83, HFOV = 66.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −9.737 (ASP) 0.300 Plastic 1.544 56.0−2.51 2 1.606 (ASP) 0.877 3 Stop Plano −0.404 4 Lens 2 1.586 (ASP) 0.360Plastic 1.603 28.5 5.44 5 2.809 (ASP) 0.413 6 Ape. Stop Plano −0.040 7Lens 3 5.752 (ASP) 0.355 Plastic 1.559 40.4 9.75 8 −100.000 (ASP) 0.0259 Lens 4 9.623 (ASP) 0.250 Plastic 1.705 14.0 18.45 10 36.593 (ASP)0.025 11 Lens 5 22.262 (ASP) 0.607 Plastic 1.544 56.0 17.47 12 −16.431(ASP) 0.025 13 Lens 6 4.226 (ASP) 0.553 Plastic 1.544 56.0 3.36 14−3.073 (ASP) 0.129 15 Lens 7 −1.040 (ASP) 0.270 Plastic 1.705 14.0 −2.5216 −2.770 (ASP) 0.025 17 Lens 8 1.694 (ASP) 0.550 Plastic 1.544 56.03.06 18 −82.250 (ASP) 0.025 19 Lens 9 0.851 (ASP) 0.420 Plastic 1.60726.6 9.60 20 0.810 (ASP) 0.900 21 IR-cut Filter Plano 0.210 Glass 1.51764.2 — 22 Plano 0.325 23 Image Plano 0.000 Note: Reference wavelength is587.6 nm (d-line). An effective radius of the stop 801 (Surface 3) is1.100 mm. An effective radius of the image-side surface 852 (Surface 12)is 1.000 mm.

TABLE 16 Aspheric Coefficients Surface # 1 2 4 5 7 k = −9.9000E+01−7.3530E−01 −1.5542E−02 −2.2508E+00  2.2028E+01 A4 =  4.1561E−02−5.1039E−02 −5.9465E−02 1.5287E−01 4.1487E−02 A6 = −1.0786E−02 4.7740E−02  6.9452E−02 1.6362E−01 2.2306E−01 A8 =  1.4270E−03−3.2797E−02  3.1088E−02 1.9381E−01 −7.6575E−01  A10 =  1.5132E−04 1.0588E−02  3.5147E−02 −7.0816E−02  1.5440E+00 A12 = −7.6974E−05−1.1727E−03 −5.6892E−02 2.7099E−01 −1.0668E+00  A14 =  9.6940E−06 — — —— A16 = −4.1351E−07 — — — — Surface # 8 9 10 11 12 k = −9.0000E+01−2.1727E+01 −3.5740E+01 −7.3760E+01 −3.9242E+01 A4 =  2.1511E−02−4.4415E−03 −3.7344E−03  2.9832E−02 −4.3340E−01 A6 = −2.8098E−02 5.1928E−03  4.6416E−02 −3.8651E−03  4.4484E−01 A8 =  1.3833E−02 4.9030E−04  2.2994E−02  2.6758E−02 −4.9113E−01 A10 = −7.6049E−04−3.2805E−04 −2.5933E−03  4.1357E−02  3.4516E−01 A12 =  7.9684E−02−4.3063E−03 −1.6788E−02 −4.8197E−02 −9.6778E−02 Surface # 13 14 15 16 17k = −7.3785E+01 −1.3321E+01 −2.5779E+00  1.1823E+00 −3.7547E+00 A4 =−3.2166E−01 −1.4576E−01 −1.2746E−02 −2.2247E−01  6.3620E−02 A6 = 2.1187E−01 −3.0991E−01 −2.2671E−01  4.2920E−01 −6.7763E−02 A8 =−9.2190E−02  5.2317E−01  7.2752E−01 −2.9442E−01  1.8006E−02 A10 =−3.4918E−01 −1.6948E−01 −8.0456E−01  1.0047E−01  1.4198E−03 A12 = 7.1527E−01 −3.3707E−01  2.9930E−01 −1.0458E−02 −1.6411E−03 A14 =−5.6465E−01  3.2199E−01  3.8876E−02 −3.0970E−03  2.9371E−04 A16 = 1.7168E−01 −7.8719E−02 −3.5632E−02  7.1594E−04 −1.7109E−05 Surface # 1819 20 k = −9.0000E+01 −1.4920E+00 −2.7062E+00 A4 =  3.4564E−01−3.6156E−01 −1.5043E−01 A6 = −3.3068E−01  2.6346E−01  6.7489E−02 A8 = 1.5453E−01 −1.7477E−01 −1.7689E−02 A10 = −4.0010E−02  8.8528E−02 3.3237E−03 A12 =  5.7236E−03 −2.8960E−02 −5.5787E−04 A14 = −4.2081E−04 5.8080E−03  7.9861E−05 A16 =  1.2302E−05 −6.8847E−04 −7.6730E−06 A18 =—  4.4227E−05  4.0370E−07 A20 = — −1.1860E−06 −8.7794E−09

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 7thembodiments with corresponding values for the 8th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 15 and Table 16as the following values and satisfy the following conditions:

8th Embodiment f [mm] 1.84 R18/ImgH 0.25 Fno 1.83 TL/Y92 2.28 HFOV[deg.] 66.0 Y92/BL 1.90 FOV [deg.] 132.0 Yc92/Yc82 1.15 V1/N1 36.26fG1/f −8.07 V2/N2 17.78 f/fG2 0.15 V3/N3 25.95 f/fG3 0.71 V4/N4 8.21f/f1 −0.73 V5/N5 36.26 |f/f1| 0.73 V6/N6 36.26 f/f2 0.34 V7/N7 8.21|f/f2| 0.34 V8/N8 36.26 f/f3 0.19 V9/N9 16.57 |f/f3| 0.19 Vmin 14.0 f/f40.10 V40 4 |f/f4| 0.10 V30 4 f/f5 0.11 V20 2 |f/f5| 0.11 Sd/Td 0.68 f/f60.55 Td/ΣCT 1.30 |f/f6| 0.55 TL/ImgH 1.91 f/f7 −0.73 TL/EPD 6.18 |f/f7|0.73 TL/f 3.38 f/f8 0.60 TL/[ImgH × tan(CRA)] 2.74 |f/f8| 0.60 Y11/ImgH0.72 f/f9 0.19 Ymax/Ymin 4.12 |f/f9| 0.19 f123/f −8.07 |f/R17| + |f/R18|4.42 f123/f456 −5.74 NIF 15 Yc11/Y11 0.34 — —

9th Embodiment

FIG. 17 is a schematic view of an image capturing unit according to the9th embodiment of the present disclosure. FIG. 18 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 9thembodiment. In FIG. 17, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 999. The optical lens system includes, in order froman object side to an image side, an aperture stop 900, a first lenselement 910, a second lens element 920, a third lens element 930, afourth lens element 940, a fifth lens element 950, a stop 901, a sixthlens element 960, a seventh lens element 970, an eighth lens element980, a ninth lens element 990, an IR-cut filter 996 and an image surface998. In addition, the optical lens system has a configuration of a frontlens group (the first lens element 910, the second lens element 920 andthe third lens element 930), a middle lens group (the fourth lenselement 940, the fifth lens element 950 and the sixth lens element 960)and a rear lens group (the seventh lens element 970, the eighth lenselement 980 and the ninth lens element 990). The optical lens systemincludes nine lens elements (910˜990) with no additional lens elementdisposed between each of the adjacent nine lens elements.

The first lens element 910 with positive refractive power has anobject-side surface 911 being convex in a paraxial region thereof and animage-side surface 912 being concave in a paraxial region thereof. Thefirst lens element 910 is made of plastic material and has theobject-side surface 911 and the image-side surface 912 being bothaspheric.

The second lens element 920 with positive refractive power has anobject-side surface 921 being convex in a paraxial region thereof and animage-side surface 922 being convex in a paraxial region thereof. Thesecond lens element 920 is made of plastic material and has theobject-side surface 921 and the image-side surface 922 being bothaspheric. The image-side surface 922 of the second lens element 920 hasthree inflection points.

The third lens element 930 with positive refractive power has anobject-side surface 931 being concave in a paraxial region thereof andan image-side surface 932 being convex in a paraxial region thereof. Thethird lens element 930 is made of plastic material and has theobject-side surface 931 and the image-side surface 932 being bothaspheric. The object-side surface 931 of the third lens element 930 hasone inflection point. The image-side surface 932 of the third lenselement 930 has one inflection point.

The fourth lens element 940 with negative refractive power has anobject-side surface 941 being concave in a paraxial region thereof andan image-side surface 942 being concave in a paraxial region thereof.The fourth lens element 940 is made of plastic material and has theobject-side surface 941 and the image-side surface 942 being bothaspheric. The object-side surface 941 of the fourth lens element 940 hasone inflection points.

The fifth lens element 950 with negative refractive power has anobject-side surface 951 being convex in a paraxial region thereof and animage-side surface 952 being concave in a paraxial region thereof. Thefifth lens element 950 is made of plastic material and has theobject-side surface 951 and the image-side surface 952 being bothaspheric.

The sixth lens element 960 with negative refractive power has anobject-side surface 961 being convex in a paraxial region thereof and animage-side surface 962 being concave in a paraxial region thereof. Thesixth lens element 960 is made of plastic material and has theobject-side surface 961 and the image-side surface 962 being bothaspheric. The object-side surface 961 of the sixth lens element 960 hasone inflection point. The image-side surface 962 of the sixth lenselement 960 has two inflection points.

The seventh lens element 970 with positive refractive power has anobject-side surface 971 being concave in a paraxial region thereof andan image-side surface 972 being convex in a paraxial region thereof. Theseventh lens element 970 is made of plastic material and has theobject-side surface 971 and the image-side surface 972 being bothaspheric. The object-side surface 971 of the seventh lens element 970has two inflection points. The image-side surface 972 of the seventhlens element 970 has two inflection points. The image-side surface 972of the seventh lens element 970 has at least one critical point in anoff-axis region thereof.

The eighth lens element 980 with negative refractive power has anobject-side surface 981 being concave in a paraxial region thereof andan image-side surface 982 being concave in a paraxial region thereof.The eighth lens element 980 is made of plastic material and has theobject-side surface 981 and the image-side surface 982 being bothaspheric. The image-side surface 982 of the eighth lens element 980 hasone inflection point. The image-side surface 982 of the eighth lenselement 980 has at least one critical point in an off-axis regionthereof.

The ninth lens element 990 with positive refractive power has anobject-side surface 991 being concave in a paraxial region thereof andan image-side surface 992 being convex in a paraxial region thereof. Theninth lens element 990 is made of plastic material and has theobject-side surface 991 and the image-side surface 992 being bothaspheric. The object-side surface 991 of the ninth lens element 990 hasone inflection point. The image-side surface 992 of the ninth lenselement 990 has one inflection point.

The IR-cut filter 996 is made of glass material and located between theninth lens element 990 and the image surface 998, and will not affectthe focal length of the optical lens system. The image sensor 999 isdisposed on or near the image surface 998 of the optical lens system.

The detailed optical data of the 9th embodiment are shown in Table 17and the aspheric surface data are shown in Table 18 below.

TABLE 17 9th Embodiment f = 7.91 mm, Fno = 2.35, HFOV = 20.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.806 2 Lens 1 1.956 (ASP)0.791 Plastic 1.544 56.0 5.82 3 4.388 (ASP) 0.035 4 Lens 2 4.281 (ASP)0.618 Plastic 1.544 56.0 6.33 5 −16.746 (ASP) 0.035 6 Lens 3 −19.794(ASP) 0.318 Plastic 1.544 56.0 154.77 7 −16.117 (ASP) 0.036 8 Lens 4−704.970 (ASP) 0.220 Plastic 1.650 21.8 −6.95 9 4.542 (ASP) 0.370 10Lens 5 6.518 (ASP) 0.250 Plastic 1.566 37.4 −9.95 11 2.980 (ASP) 0.18012 Stop Plano 0.336 13 Lens 6 94.505 (ASP) 0.260 Plastic 1.705 14.0−9.93 14 6.513 (ASP) 0.196 15 Lens 7 −28.560 (ASP) 0.280 Plastic 1.68018.4 10.28 16 −5.637 (ASP) 0.501 17 Lens 8 −5.292 (ASP) 0.300 Plastic1.544 56.0 −6.05 18 8.888 (ASP) 0.595 19 Lens 9 −45.740 (ASP) 0.928Plastic 1.705 14.0 24.08 20 −12.483 (ASP) 0.300 21 IR-cut Filter Plano0.210 Glass 1.517 64.2 — 22 Plano 0.245 23 Image Plano 0.000 Note:Reference wavelength is 587.6 nm (d-line). An effective radius of thestop 901 (Surface 12) is 0.980 mm. An effective radius of theobject-side surface 991 (Surface 19) is 2.175 mm.

TABLE 18 Aspheric Coefficients Surface # 2 3 4 5 6 k = −1.8549E−01−2.9534E−02  1.6783E−01 −8.3288E+01 3.2245E+01 A4 = −1.6424E−04 1.2650E−02  1.0398E−02 −2.3901E−02 −6.4831E−03  A6 = −1.1346E−03−5.2591E−02 −5.5053E−02  4.8300E−02 2.9401E−02 A8 =  3.9217E−04 8.1823E−02  9.3647E−02 −2.4992E−02 −2.9146E−02  A10 = −5.1517E−04−5.4826E−02 −6.6200E−02 −9.3294E−03 7.5550E−03 A12 =  3.6404E−04 1.3421E−02  1.8983E−02  1.6279E−02 4.2301E−03 A14 = −2.0122E−04 5.5420E−04 −7.9181E−04 −7.5082E−03 −3.4924E−03  A16 =  3.2768E−05−4.5161E−04 −3.0025E−04  1.3423E−03 8.3267E−04 Surface # 7 8 9 10 11 k =−9.0000E+01 −9.0000E+01 −4.9893E+01  7.6833E+00  1.8110E+00 A4 = 2.6603E−02 −2.1682E−03  4.6465E−02 −1.1222E−01 −1.3717E−01 A6 =−1.0012E−01  3.7806E−02  8.8109E−02  1.8080E−01  1.7618E−01 A8 = 1.8090E−01  2.1968E−02 −1.1300E−01 −2.1029E−01 −2.7734E−01 A10 =−1.6787E−01 −3.2594E−02  1.6694E−01  2.3217E−01  3.2731E−01 A12 = 8.5578E−02  1.1973E−02 −1.4393E−01 −1.2641E−01 −2.4930E−01 A14 =−2.3075E−02 −1.9385E−03  8.7598E−02  3.4221E−02  1.1224E−01 A16 = 2.7621E−03  2.7638E−04 −2.4740E−02 −1.7155E−03 −2.0879E−02 Surface # 1314 15 16 17 k = −3.9402E+01  2.1676E+01  8.8081E+01 −2.0619E+00−7.8363E+01 A4 = −2.6485E−01 −3.4358E−01 −1.4604E−01  3.6605E−03−1.0022E−01 A6 =  2.2985E−01  3.0926E−01 −1.4758E−02 −7.7043E−02 6.3927E−02 A8 = −4.6510E−01 −3.3973E−01  2.9473E−01  2.0624E−01−4.8645E−02 A10 =  5.4847E−01  2.7750E−01 −3.0329E−01 −1.7631E−01 3.0813E−02 A12 = −5.6076E−01 −1.4772E−01  1.4018E−01  7.3106E−02−1.0501E−02 A14 =  3.6624E−01  5.3691E−02 −3.1616E−02 −1.5223E−02 1.3939E−03 A16 = −9.8571E−02 −9.6782E−03  2.7740E−03  1.2755E−03−1.5125E−05 Surface # 18 19 20 k = −4.8886E+01 −4.1538E+01  1.0737E+01A4 = −1.0669E−01 −7.6618E−02 −9.6969E−02 A6 =  6.0260E−02  3.5648E−02 4.3438E−02 A8 = −3.9119E−02 −1.7575E−02 −1.6243E−02 A10 =  1.7652E−02 5.1516E−03  3.9576E−03 A12 = −4.3630E−03 −8.0838E−04 −5.9649E−04 A14 = 4.8631E−04  6.8219E−05  4.7179E−05 A16 = −1.4704E−05 −2.5324E−06−1.2504E−06

In the 9th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 8thembodiments with corresponding values for the 9th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 17 and Table 18as the following values and satisfy the following conditions:

9th Embodiment f [mm] 7.91 R18/ImgH −4.25 Fno 2.35 TL/Y92 3.14 HFOV[deg.] 20.0 Y92/BL 2.95 FOV [deg.] 40.0 fG1/f 0.41 V1/N1 36.26 f/fG2−0.13 V2/N2 36.26 f/fG3 −2.99 V3/N3 36.26 f/f1 1.36 V4/N4 13.21 |f/f1|1.36 V5/N5 23.91 f/f2 1.25 V6/N6 8.21 |f/f2| 1.25 V7/N7 10.95 f/f3 0.05V8/N8 36.26 |f/f3| 0.05 V9/N9 8.21 f/f4 −1.14 Vmin 14.0 |f/f4| 1.14 V405 f/f5 −0.79 V30 4 |f/f5| 0.79 V20 3 f/f6 −0.80 Sd/Td 0.87 |f/f6| 0.80Td/ΣCT 1.58 f/f7 0.77 TL/ImgH 2.39 |f/f7| 0.77 TL/EPD 2.08 f/f8 −1.31TL/f 0.89 |f/f8| 1.31 TL/[ImgH × tan(CRA)] 5.95 f/f9 0.33 Y11/ImgH 0.57|f/f9| 0.33 Ymax/Ymin 2.24 |f/R17| + |f/R18| 0.81 f123/f 0.41 NIF 16f123/f456 −1.23 — —

10th Embodiment

FIG. 19 is a schematic view of an image capturing unit according to the10th embodiment of the present disclosure. FIG. 20 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 10thembodiment. In FIG. 19, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 1099. The optical lens system includes, in orderfrom an object side to an image side, an aperture stop 1000, a firstlens element 1010, a second lens element 1020, a third lens element1030, a fourth lens element 1040, a fifth lens element 1050, a stop1001, a sixth lens element 1060, a seventh lens element 1070, an eighthlens element 1080, a ninth lens element 1090, an IR-cut filter 1096 andan image surface 1098. In addition, the optical lens system has aconfiguration of a front lens group (the first lens element 1010, thesecond lens element 1020 and the third lens element 1030), a middle lensgroup (the fourth lens element 1040, the fifth lens element 1050 and thesixth lens element 1060) and a rear lens group (the seventh lens element1070, the eighth lens element 1080 and the ninth lens element 1090). Theoptical lens system includes nine lens elements (1010˜1090) with noadditional lens element disposed between each of the adjacent nine lenselements.

The first lens element 1010 with positive refractive power has anobject-side surface 1011 being convex in a paraxial region thereof andan image-side surface 1012 being convex in a paraxial region thereof.The first lens element 1010 is made of plastic material and has theobject-side surface 1011 and the image-side surface 1012 being bothaspheric. The image-side surface 1012 of the first lens element 1010 hasthree inflection points.

The second lens element 1020 with negative refractive power has anobject-side surface 1021 being concave in a paraxial region thereof andan image-side surface 1022 being concave in a paraxial region thereof.The second lens element 1020 is made of plastic material and has theobject-side surface 1021 and the image-side surface 1022 being bothaspheric. The object-side surface 1021 of the second lens element 1020has one inflection point. The image-side surface 1022 of the second lenselement 1020 has one inflection point.

The third lens element 1030 with positive refractive power has anobject-side surface 1031 being convex in a paraxial region thereof andan image-side surface 1032 being concave in a paraxial region thereof.The third lens element 1030 is made of plastic material and has theobject-side surface 1031 and the image-side surface 1032 being bothaspheric. The object-side surface 1031 of the third lens element 1030has one inflection point.

The fourth lens element 1040 with negative refractive power has anobject-side surface 1041 being convex in a paraxial region thereof andan image-side surface 1042 being concave in a paraxial region thereof.The fourth lens element 1040 is made of plastic material and has theobject-side surface 1041 and the image-side surface 1042 being bothaspheric.

The fifth lens element 1050 with negative refractive power has anobject-side surface 1051 being convex in a paraxial region thereof andan image-side surface 1052 being concave in a paraxial region thereof.The fifth lens element 1050 is made of plastic material and has theobject-side surface 1051 and the image-side surface 1052 being bothaspheric.

The sixth lens element 1060 with negative refractive power has anobject-side surface 1061 being convex in a paraxial region thereof andan image-side surface 1062 being concave in a paraxial region thereof.The sixth lens element 1060 is made of plastic material and has theobject-side surface 1061 and the image-side surface 1062 being bothaspheric. The object-side surface 1061 of the sixth lens element 1060has one inflection point. The image-side surface 1062 of the sixth lenselement 1060 has two inflection points.

The seventh lens element 1070 with positive refractive power has anobject-side surface 1071 being concave in a paraxial region thereof andan image-side surface 1072 being convex in a paraxial region thereof.The seventh lens element 1070 is made of plastic material and has theobject-side surface 1071 and the image-side surface 1072 being bothaspheric. The object-side surface 1071 of the seventh lens element 1070has two inflection points. The image-side surface 1072 of the seventhlens element 1070 has two inflection points. The object-side surface1071 of the seventh lens element 1070 has at least one critical point inan off-axis region thereof. The image-side surface 1072 of the seventhlens element 1070 has at least one critical point in an off-axis regionthereof.

The eighth lens element 1080 with positive refractive power has anobject-side surface 1081 being concave in a paraxial region thereof andan image-side surface 1082 being convex in a paraxial region thereof.The eighth lens element 1080 is made of plastic material and has theobject-side surface 1081 and the image-side surface 1082 being bothaspheric.

The ninth lens element 1090 with negative refractive power has anobject-side surface 1091 being concave in a paraxial region thereof andan image-side surface 1092 being convex in a paraxial region thereof.The ninth lens element 1090 is made of plastic material and has theobject-side surface 1091 and the image-side surface 1092 being bothaspheric. The object-side surface 1091 of the ninth lens element 1090has two inflection points. The image-side surface 1092 of the ninth lenselement 1090 has one inflection point.

The IR-cut filter 1096 is made of glass material and located between theninth lens element 1090 and the image surface 1098, and will not affectthe focal length of the optical lens system. The image sensor 1099 isdisposed on or near the image surface 1098 of the optical lens system.

The detailed optical data of the 10th embodiment are shown in Table 19and the aspheric surface data are shown in Table 20 below.

TABLE 19 10th Embodiment f = 6.77 mm, Fno = 2.23, HFOV = 23.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.600 2 Lens 1 2.044 (ASP)1.039 Plastic 1.545 56.1 3.35 3 −14.016 (ASP) 0.030 4 Lens 2 −15.964(ASP) 0.300 Plastic 1.639 23.5 −12.38 5 15.778 (ASP) 0.039 6 Lens 310.937 (ASP) 0.300 Plastic 1.639 23.5 26.36 7 30.884 (ASP) 0.035 8 Lens4 11.624 (ASP) 0.220 Plastic 1.611 23.5 −13.78 9 4.849 (ASP) 0.261 10Lens 5 5.004 (ASP) 0.248 Plastic 1.607 26.6 −10.96 11 2.803 (ASP) 0.17312 Stop Plano 0.366 13 Lens 6 57.412 (ASP) 0.260 Plastic 1.705 14.0−13.73 14 8.265 (ASP) 0.064 15 Lens 7 −33.600 (ASP) 0.280 Plastic 1.72014.5 13.70 16 −7.652 (ASP) 0.474 17 Lens 8 −13.192 (ASP) 0.388 Plastic1.720 14.5 114.14 18 −11.507 (ASP) 0.787 19 Lens 9 −2.850 (ASP) 0.385Plastic 1.544 56.0 −7.83 20 −9.027 (ASP) 0.300 21 IR-cut Filter Plano0.145 Glass 1.517 64.2 — 22 Plano 0.409 23 Image Plano 0.000 Note:Reference wavelength is 587.6 nm (d-line). An effective radius of thestop 1001 (Surface 12) is 1.000 mm.

TABLE 20 Aspheric Coefficients Surface # 2 3 4 5 6 k = −2.1455E−010.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 A4 = −1.0587E−03 3.8955E−031.3250E−03 −1.0943E−02  1.1868E−03 A6 =  1.7954E−04 2.2625E−03−3.4154E−03  5.2890E−03 −1.2929E−02  A8 =  6.5289E−04 2.4203E−031.7707E−02 4.3921E−02 4.7443E−02 A10 = −1.5093E−03 −1.3581E−02 −3.0823E−02  −9.8465E−02  −9.0564E−02  A12 =  8.8598E−04 1.7235E−022.7926E−02 8.6796E−02 8.3179E−02 A14 = −1.8626E−04 −8.9826E−03 −1.2664E−02  −3.6591E−02  −3.7062E−02  A16 = — 1.6702E−03 2.2446E−036.0556E−03 6.3050E−03 Surface # 7 8 9 10 11 k = 9.0000E+01 5.5976E+01−7.7649E+01 1.5268E+00 2.5259E+00 A4 = 2.7877E−02 −1.7391E−02 −8.6831E−03 −2.0898E−01  −1.9368E−01  A6 = −5.7641E−02  1.4229E−01 1.9593E−01 3.6848E−01 2.8644E−01 A8 = 6.4891E−02 −1.7583E−01 −1.7975E−01 −3.4628E−01  −3.1870E−01  A10 = −2.9053E−02  1.5915E−01 8.0674E−02 2.2341E−01 2.4679E−01 A12 = 2.8009E−03 −8.3667E−02  2.3655E−02 −6.5324E−02  −1.3129E−01  A14 = 9.0079E−04 1.7563E−02−2.2895E−02 8.1605E−03 3.8100E−02 Surface # 13 14 15 16 17 k = 9.0000E+01  3.0317E+01  8.3964E+01  8.9749E+00  5.2114E+01 A4 =−2.0101E−01 −4.0787E−01 −3.1280E−01 −9.0018E−02 −5.9838E−02 A6 = 1.2261E−01  4.6826E−01  5.1197E−01  2.0541E−01 −8.9358E−04 A8 =−3.6296E−01 −6.2425E−01 −3.9023E−01 −1.6515E−01 −3.5428E−03 A10 = 4.5511E−01  6.3772E−01  1.7650E−01  7.6305E−02  1.1957E−02 A12 =−4.4706E−01 −4.6238E−01 −4.8385E−02 −2.1223E−02 −7.0308E−03 A14 = 2.6143E−01  2.0883E−01  7.4845E−03  3.2894E−03  1.5848E−03 A16 =−6.1003E−02 −4.0014E−02 −5.6141E−04 −2.4356E−04 −1.2261E−04 Surface # 1819 20 k =  6.1307E+00  5.9531E−01  1.2094E+01 A4 = −3.1991E−02−2.2128E−02 −6.5803E−02 A6 = −2.7744E−02 −2.7022E−02  3.8764E−03 A8 = 2.3298E−02  2.1255E−02  2.9479E−03 A10 = −9.3488E−03 −3.5515E−03−1.2906E−04 A12 =  2.4191E−03 −9.4594E−04 −3.1843E−04 A14 = −4.4932E−04 4.0018E−04  7.1653E−05 A16 =  4.2024E−05 −3.7815E−05 −4.3901E−06

In the 10th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 9thembodiments with corresponding values for the 10th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 19 and Table 20as the following values and satisfy the following conditions:

10th Embodiment f [mm] 6.77 R18/ImgH −3.08 Fno 2.23 TL/Y92 3.01 HFOV[deg.] 23.0 Y92/BL 2.53 FOV [deg.] 46.0 fG1/f 0.56 V1/N1 36.30 f/fG2−0.24 V2/N2 14.34 f/fG3 −1.69 V3/N3 14.34 f/f1 2.02 V4/N4 14.59 |f/f1|2.02 V5/N5 16.57 f/f2 −0.55 V6/N6 8.21 |f/f2| 0.55 V7/N7 8.43 f/f3 0.26V8/N8 8.43 |f/f3| 0.26 V9/N9 36.26 f/f4 −0.49 Vmin 14.0 |f/f4| 0.49 V407 f/f5 −0.62 V30 7 |f/f5| 0.62 V20 3 f/f6 −0.49 Sd/Td 0.89 |f/f6| 0.49Td/ΣCT 1.65 f/f7 0.49 TL/ImgH 2.22 |f/f7| 0.49 TL/EPD 2.14 f/f8 0.06TL/f 0.96 |f/f8| 0.06 TL/[ImgH × tan(CRA)] 4.25 f/f9 −0.86 Y11/ImgH 0.52|f/f9| 0.86 Ymax/Ymin 2.14 |f/R17| + |f/R18| 3.12 f123/f 0.56 NIF 16f123/f456 −0.94 — —

11th Embodiment

FIG. 21 is a schematic view of an image capturing unit according to the11th embodiment of the present disclosure. FIG. 22 shows, in order fromleft to right, spherical aberration curves, astigmatic field curves anda distortion curve of the image capturing unit according to the 11thembodiment. In FIG. 21, the image capturing unit includes the opticallens system (its reference numeral is omitted) of the present disclosureand an image sensor 1199. The optical lens system includes, in orderfrom an object side to an image side, an aperture stop 1100, a firstlens element 1110, a second lens element 1120, a third lens element1130, a fourth lens element 1140, a fifth lens element 1150, a stop1101, a sixth lens element 1160, a seventh lens element 1170, an eighthlens element 1180, a ninth lens element 1190, an IR-cut filter 1196 andan image surface 1198. In addition, the optical lens system has aconfiguration of a front lens group (the first lens element 1110, thesecond lens element 1120 and the third lens element 1130), a middle lensgroup (the fourth lens element 1140, the fifth lens element 1150 and thesixth lens element 1160) and a rear lens group (the seventh lens element1170, the eighth lens element 1180 and the ninth lens element 1190). Theoptical lens system includes nine lens elements (1110˜1190) with noadditional lens element disposed between each of the adjacent nine lenselements.

The first lens element 1110 with positive refractive power has anobject-side surface 1111 being convex in a paraxial region thereof andan image-side surface 1112 being convex in a paraxial region thereof.The first lens element 1110 is made of glass material and has theobject-side surface 1111 and the image-side surface 1112 being bothaspheric. The image-side surface 1112 of the first lens element 1110 hasthree inflection points.

The second lens element 1120 with negative refractive power has anobject-side surface 1121 being concave in a paraxial region thereof andan image-side surface 1122 being concave in a paraxial region thereof.The second lens element 1120 is made of plastic material and has theobject-side surface 1121 and the image-side surface 1122 being bothaspheric. The object-side surface 1121 of the second lens element 1120has three inflection points. The image-side surface 1122 of the secondlens element 1120 has two inflection points.

The third lens element 1130 with positive refractive power has anobject-side surface 1131 being convex in a paraxial region thereof andan image-side surface 1132 being convex in a paraxial region thereof.The third lens element 1130 is made of plastic material and has theobject-side surface 1131 and the image-side surface 1132 being bothaspheric. The object-side surface 1131 of the third lens element 1130has one inflection point. The image-side surface 1132 of the third lenselement 1130 has one inflection point.

The fourth lens element 1140 with negative refractive power has anobject-side surface 1141 being convex in a paraxial region thereof andan image-side surface 1142 being concave in a paraxial region thereof.The fourth lens element 1140 is made of plastic material and has theobject-side surface 1141 and the image-side surface 1142 being bothaspheric.

The fifth lens element 1150 with negative refractive power has anobject-side surface 1151 being convex in a paraxial region thereof andan image-side surface 1152 being concave in a paraxial region thereof.The fifth lens element 1150 is made of plastic material and has theobject-side surface 1151 and the image-side surface 1152 being bothaspheric. The object-side surface 1151 of the fifth lens element 1150has two inflection points.

The sixth lens element 1160 with negative refractive power has anobject-side surface 1161 being convex in a paraxial region thereof andan image-side surface 1162 being concave in a paraxial region thereof.The sixth lens element 1160 is made of plastic material and has theobject-side surface 1161 and the image-side surface 1162 being bothaspheric. The object-side surface 1161 of the sixth lens element 1160has one inflection point. The image-side surface 1162 of the sixth lenselement 1160 has two inflection points.

The seventh lens element 1170 with positive refractive power has anobject-side surface 1171 being convex in a paraxial region thereof andan image-side surface 1172 being convex in a paraxial region thereof.The seventh lens element 1170 is made of plastic material and has theobject-side surface 1171 and the image-side surface 1172 being bothaspheric. The object-side surface 1171 of the seventh lens element 1170has three inflection points. The image-side surface 1172 of the seventhlens element 1170 has two inflection points. The object-side surface1171 of the seventh lens element 1170 has at least one critical point inan off-axis region thereof. The image-side surface 1172 of the seventhlens element 1170 has at least one critical point in an off-axis regionthereof.

The eighth lens element 1180 with positive refractive power has anobject-side surface 1181 being convex in a paraxial region thereof andan image-side surface 1182 being concave in a paraxial region thereof.The eighth lens element 1180 is made of plastic material and has theobject-side surface 1181 and the image-side surface 1182 being bothaspheric. The object-side surface 1181 of the eighth lens element 1180has one inflection point. The image-side surface 1182 of the eighth lenselement 1180 has one inflection point. The object-side surface 1181 ofthe eighth lens element 1180 has at least one critical point in anoff-axis region thereof. The image-side surface 1182 of the eighth lenselement 1180 has at least one critical point in an off-axis regionthereof.

The ninth lens element 1190 with negative refractive power has anobject-side surface 1191 being concave in a paraxial region thereof andan image-side surface 1192 being convex in a paraxial region thereof.The ninth lens element 1190 is made of plastic material and has theobject-side surface 1191 and the image-side surface 1192 being bothaspheric

The IR-cut filter 1196 is made of glass material and located between theninth lens element 1190 and the image surface 1198, and will not affectthe focal length of the optical lens system. The image sensor 1199 isdisposed on or near the image surface 1198 of the optical lens system.

The detailed optical data of the 11th embodiment are shown in Table 21and the aspheric surface data are shown in Table 22 below.

TABLE 21 11th Embodiment f = 7.29 mm, Fno = 2.45, HFOV = 21.5 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Ape. Stop Plano −0.603 2 Lens 1 2.044 (ASP)0.947 Glass 1.542 62.9 3.63 3 −43.933 (ASP) 0.053 4 Lens 2 −22.015 (ASP)0.343 Plastic 1.650 21.5 −22.07 5 41.527 (ASP) 0.057 6 Lens 3 92.907(ASP) 0.300 Plastic 1.614 26.0 31.90 7 −24.772 (ASP) 0.035 8 Lens 412.698 (ASP) 0.221 Plastic 1.614 26.0 −11.48 9 4.501 (ASP) 0.266 10 Lens5 7.759 (ASP) 0.267 Plastic 1.582 30.2 −11.39 11 3.532 (ASP) 0.125 12Stop Plano 0.310 13 Lens 6 40.204 (ASP) 0.272 Plastic 1.660 20.4 −12.8614 6.987 (ASP) 0.068 15 Lens 7 100.012 (ASP) 0.339 Plastic 1.639 23.519.26 16 −14.008 (ASP) 0.158 17 Lens 8 9.088 (ASP) 0.398 Plastic 1.68618.4 25.91 18 18.265 (ASP) 1.200 19 Lens 9 −2.689 (ASP) 0.754 Plastic1.544 56.0 −10.12 20 −5.776 (ASP) 0.400 21 IR-cut Filter Plano 0.145Glass 1.517 64.2 — 22 Plano 0.347 23 Image Plano 0.000 Note: Referencewavelength is 587.6 nm (d-line). An effective radius of the stop 1101(Surface 12) is 1.000 mm.

TABLE 22 Aspheric Coefficients Surface # 2 3 4 5 6 k = −1.9856E−010.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 A4 = −3.4051E−04 2.6229E−032.8803E−03 −1.0717E−02  1.6185E−03 A6 =  1.2835E−04 1.8969E−03−3.0859E−03  5.6607E−03 −1.2975E−02  A8 =  7.0058E−04 2.4554E−031.7625E−02 4.4090E−02 4.7436E−02 A10 = −1.4911E−03 −1.3608E−02 −3.0877E−02  −9.8412E−02  −9.0525E−02  A12 =  8.8376E−04 1.7211E−022.7899E−02 8.6742E−02 8.3344E−02 A14 = −1.9339E−04 −8.9915E−03 −1.2674E−02  −3.6635E−02  −3.6937E−02  A16 = — 1.6698E−03 2.2407E−036.0810E−03 6.3025E−03 Surface # 7 8 9 10 11 k = −8.7036E+01  5.1546E+01−6.4604E+01  6.3636E+00 2.9950E+00 A4 = 3.0843E−02 −1.8563E−02 8.2595E−04 −2.0423E−01  −1.8649E−01  A6 = −5.6334E−02  1.4305E−011.9520E−01 3.7470E−01 2.8481E−01 A8 = 6.5753E−02 −1.7583E−01 −1.7938E−01  −3.4441E−01  −3.1711E−01  A10 = −2.8475E−02  1.5877E−018.2301E−02 2.2381E−01 2.5082E−01 A12 = 2.9592E−03 −8.3234E−02 2.4428E−02 −6.6216E−02  −1.2953E−01  A14 = 1.1002E−03 1.8210E−02−2.2518E−02  7.5239E−03 3.2778E−02 Surface # 13 14 15 16 17 k = 8.8856E+01  2.6511E+01 −6.0205E+01  6.5250E+01 −8.3367E+01 A4 =−1.7266E−01 −4.0466E−01 −3.2397E−01 −9.2253E−02 −6.7920E−02 A6 = 1.1900E−01  4.6193E−01  5.0817E−01  2.0392E−01  5.2704E−03 A8 =−3.6844E−01 −6.2677E−01 −3.8978E−01 −1.6552E−01 −1.4103E−03 A10 = 4.6249E−01  6.4046E−01  1.7699E−01  7.6554E−02  1.2012E−02 A12 =−4.3695E−01 −4.6001E−01 −4.8063E−02 −2.1161E−02 −7.0962E−03 A14 = 2.6378E−01  2.0885E−01  7.5416E−03  3.2699E−03  1.5480E−03 A16 =−6.7874E−02 −4.1537E−02 −7.0872E−04 −2.6578E−04 −1.6284E−04 Surface # 1819 20 k = −3.4673E+01  5.2067E−01 −1.0891E+00 A4 = −3.6736E−02 5.7564E−04 −1.8933E−02 A6 = −3.2509E−02 −2.8274E−02 −1.3874E−02 A8 = 4.3274E−02  1.9973E−02  6.8649E−03 A10 = −2.6005E−02 −3.4729E−03−9.7404E−04 A12 =  9.6510E−03 −8.9512E−04 −7.0889E−05 A14 = −2.0620E−03 4.0427E−04  2.8729E−05 A16 =  1.8301E−04 −4.0421E−05 −1.8518E−06

In the 11th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st to 10thembodiments with corresponding values for the 11th embodiment, so anexplanation in this regard will not be provided again.

Moreover, these parameters can be calculated from Table 21 and Table 22as the following values and satisfy the following conditions:

11th Embodiment f [mm] 7.29 R18/ImgH −1.97 Fno 2.45 TL/Y92 3.15 HFOV[deg.] 21.5 Y92/BL 2.49 FOV [deg.] 43.0 fG1/f 0.52 V1/N1 40.78 f/fG20.02 V2/N2 13.01 f/fG3 −1.95 V3/N3 16.09 f/f1 2.01 V4/N4 16.09 |f/f1|2.01 V5/N5 19.11 f/f2 −0.33 V6/N6 12.29 |f/f2| 0.33 V7/N7 14.34 f/f30.23 V8/N8 10.91 |f/f3| 0.23 V9/N9 36.26 f/f4 −0.64 Vmin 18.4 |f/f4|0.64 V40 7 f/f5 −0.64 V30 6 |f/f5| 0.64 V20 1 f/f6 −0.57 Sd/Td 0.90|f/f6| 0.57 Td/ΣCT 1.59 f/f7 0.38 TL/ImgH 2.39 |f/f7| 0.38 TL/EPD 2.35f/f8 0.28 TL/f 0.96 |f/f8| 0.28 TL/[ImgH × tan(CRA)] 4.69 f/f9 −0.72Y11/ImgH 0.51 |f/f9| 0.72 Ymax/Ymin 2.23 |f/R17| + |f/R18| 3.97 f123/f0.52 NIF 22 f123/f456 −1.02 — —

12th Embodiment

FIG. 23 is a perspective view of an image capturing unit according tothe 12th embodiment of the present disclosure. In this embodiment, animage capturing unit 10 is a camera module including a lens unit 11, adriving device 12, an image sensor 13 and an image stabilizer 14. Thelens unit 11 includes the optical lens system disclosed in theaforementioned embodiment, a barrel and a holder member (their referencenumerals are omitted) for holding the optical lens system. The imaginglight converges in the lens unit 11 of the image capturing unit 10 togenerate an image with the driving device 12 utilized for image focusingon the image sensor 13, and the generated image is then digitallytransmitted to other electronic component for further processing.

The driving device 12 can have auto focusing functionality, anddifferent driving configurations can be obtained through the usages ofvoice coil motors (VCM), micro electro-mechanical systems (MEMS),piezoelectric systems, or shape memory alloy materials. The drivingdevice 12 is favorable for obtaining a better imaging position of thelens unit 11, so that a clear image of the imaged object can be capturedby the lens unit 11 with different object distances. The image sensor 13(for example, CCD or CMOS), which can feature high photosensitivity andlow noise, is disposed on the image surface of the optical lens systemto provide higher image quality.

The image stabilizer 14, such as an accelerometer, a gyro sensor and aHall Effect sensor, is configured to work with the driving device 12 toprovide optical image stabilization (OIS). The driving device 12 workingwith the image stabilizer 14 is favorable for compensating for pan andtilt of the lens unit 11 to reduce blurring associated with motionduring exposure. In some cases, the compensation can be provided byelectronic image stabilization (EIS) with image processing software,thereby improving image quality while in motion or low-light conditions.

13th Embodiment

FIG. 24 is a front view of an electronic device according to the 13thembodiment of the present disclosure.

In this embodiment, an electronic device 20 is a smartphone including animage capturing unit 21 and a display unit 22. In this embodiment, theimage capturing unit 21 includes the optical lens system disclosed inthe 2nd embodiment and an image sensor (their reference numbers areomitted). In FIG. 24, the image capturing unit 21 and the display unit22 are both disposed on the same side of the electronic device 20. Theimage capturing unit 21 is a front-facing camera of the electronicdevice 20 for taking selfies, but the present disclosure is not limitedthereto.

14th Embodiment

FIG. 25 is a rear view of an electronic device according to the 14thembodiment of the present disclosure.

In this embodiment, an electronic device 30 is a smartphone including animage capturing unit 31, an image capturing unit 32, an image capturingunit 33 and a display unit (its reference number is omitted), whereinthe image capturing unit 31 is a telephoto image capturing unitincluding the optical lens system disclosed in the 9th embodiment, theimage capturing unit 32 is a wide-angle image capturing unit includingthe optical lens system disclosed in the 7th embodiment, and the imagecapturing unit 33 is a standard image capturing unit including theoptical lens system disclosed in the 4th embodiment.

In this embodiment, the image capturing units 31, 32 and 33 havedifferent fields of view (e.g., the maximum field of view of the imagecapturing unit 31 is different from the maximum field of view of theimage capturing unit 33 by at least 20 degrees, the maximum field ofview of the image capturing unit 32 is different from the maximum fieldof view of the image capturing unit 33 by at least 20 degrees, and themaximum field of view of the image capturing unit 31 is different fromthe maximum field of view of the image capturing unit 32 by at least 60degrees), such that the electronic device 30 has various magnificationratios so as to meet the requirement of optical zoom functionality. Inthis embodiment, the image capturing units 31, 32 and 33 are alldisposed on the same side of the electronic device 30, while the displayunit is disposed on the opposite side of the electronic device 30.

15th Embodiment

FIG. 26 is a rear view of an electronic device according to the 15thembodiment of the present disclosure.

In this embodiment, an electronic device 40 is a smartphone including animage capturing unit 41, an image capturing unit 42 and a display unit(its reference number is omitted), wherein the image capturing unit 41is a wide-angle image capturing unit including the optical lens systemdisclosed in the 8th embodiment, and the image capturing unit 42 is astandard image capturing unit including the optical lens systemdisclosed in the 5th embodiment.

In this embodiment, the image capturing units 41 and 42 have differentfields of view (e.g., the maximum field of view of the image capturingunit 41 can be different from the maximum field of view of the imagecapturing unit 42 by at least 20 degrees), such that the electronicdevice 40 has various magnification ratios so as to meet the requirementof optical zoom functionality. In this embodiment, the image capturingunits 41 and 42 are both disposed on the same side of the electronicdevice 40, while the display unit is disposed on the opposite side ofthe electronic device 40.

The smartphone in this embodiment is only exemplary for showing theimage capturing units including the optical lens system of the presentdisclosure installed in an electronic device, and the present disclosureis not limited thereto. The optical lens system can be optionallyapplied to systems with a movable focus. Furthermore, the optical lenssystem of the image capturing unit features good capability inaberration corrections and high image quality, and can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart televisions,network surveillance devices, dashboard cameras, vehicle backup cameras,multi-camera devices, image recognition systems, motion sensing inputdevices, wearable devices and other electronic imaging devices.

The foregoing description, for the purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTABLES 1-22 show different data of the different embodiments; however,the data of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. An optical lens system comprising nine lenselements, the nine lens elements being, in order from an object side toan image side, a first lens element, a second lens element, a third lenselement, a fourth lens element, a fifth lens element, a sixth lenselement, a seventh lens element, an eighth lens element and a ninth lenselement; wherein the ninth lens element has an object-side surface beingconcave on an optical axis, at least one lens surface of the seventhlens element, the eighth lens element and the ninth lens element has atleast one critical point in an off-axis region thereof, and each of theseventh lens element, the eighth lens element and the ninth lens elementhas at least one lens surface being aspheric; wherein an axial distancebetween an object-side surface of the first lens element and an imagesurface is TL, a maximum image height of the optical lens system isImgH, an entrance pupil diameter of the optical lens system is EPD, aminimum value among Abbe numbers of all lens elements of the opticallens system is Vmin, a total number of lens elements having an Abbenumber smaller than 40 in the optical lens system is V40, and thefollowing conditions are satisfied:TL/ImgH<3.0;TL/EPD<4.0;Vmin<28; and4≤V40.
 2. The optical lens system of claim 1, wherein a focal length ofthe optical lens system is f, a composite focal length of the first lenselement, the second lens element and the third lens element is f123, andthe following condition is satisfied:0.25 <f123/f<8.0.
 3. The optical lens system of claim 1, wherein atleast five lens elements of the optical lens system are made of plasticmaterial, the axial distance between the object-side surface of thefirst lens element and the image surface is TL, a focal length of theoptical lens system is f, and the following condition is satisfied:TL/f<3.0.
 4. The optical lens system of claim 1, wherein a compositefocal length of the first lens element, the second lens element and thethird lens element is f123, a composite focal length of the fourth lenselement, the fifth lens element and the sixth lens element is f456, andthe following condition is satisfied:−1.25<f123/f456.
 5. The optical lens system of claim 1, wherein an axialdistance between the object-side surface of the first lens element andan image-side surface of the ninth lens element is Td, a sum of centralthicknesses of all lens elements of the optical lens system is ΣCT, andthe following condition is satisfied:Td/ΣCT<1.75.
 6. The optical lens system of claim 1, wherein theobject-side surface of the first lens element is concave on an opticalaxis and has at least one convex critical point in an off-axis regionthereof, a vertical distance between the critical point on theobject-side surface of the first lens element and the optical axis isYc11, a maximum effective radius of the object-side surface of the firstlens element is Y11, a maximum field of view of the optical lens systemis FOV, and the following conditions are satisfied:Yc11/Y11<0.75;and100 [deg.]<FOV<150 [deg.].
 7. The optical lens system of claim 1,further comprising an aperture stop, wherein the aperture stop isdisposed between an imaged object and the fourth lens element, an axialdistance between the aperture stop and an image-side surface of theninth lens element is Sd, an axial distance between the object-sidesurface of the first lens element and the image-side surface of theninth lens element is Td, an f-number of the optical lens system is Fno,and the following conditions are satisfied:0.60<Sd/Td<1.20; and1.0<Fno<2.20.
 8. The optical lens system of claim 1, wherein a totalnumber of lens elements having an Abbe number smaller than 30 in theoptical lens system is V30, and the following condition is satisfied:4≤V30; wherein an Abbe number of the first lens element is V1, an Abbenumber of the second lens element is V2, an Abbe number of the thirdlens element is V3, an Abbe number of the fourth lens element is V4, anAbbe number of the fifth lens element is V5, an Abbe number of the sixthlens element is V6, an Abbe number of the seventh lens element is V7, anAbbe number of the eighth lens element is V8, an Abbe number of theninth lens element is V9, an Abbe number of the i-th lens element is Vi,a refractive index of the first lens element is N1, a refractive indexof the second lens element is N2, a refractive index of the third lenselement is N3, a refractive index of the fourth lens element is N4, arefractive index of the fifth lens element is N5, a refractive index ofthe sixth lens element is N6, a refractive index of the seventh lenselement is N7, a refractive index of the eighth lens element is N8, arefractive index of the ninth lens element is N9, a refractive index ofthe i-th lens element is Ni, and at least one lens element of theoptical lens system satisfies the following condition:6.0<Vi/Ni<12.0, wherein i=1, 2, 3, 4, 5, 6, 7, 8 or
 9. 9. The opticallens system of claim 1, wherein a curvature radius of an image-sidesurface of the ninth lens element is R18, the maximum image height ofthe optical lens system is ImgH, and the following condition issatisfied:R18/ImgH<1.0.
 10. The optical lens system of claim 1, wherein a maximumvalue among maximum effective radii of all lens surfaces of the opticallens system is Ymax, a minimum value among maximum effective radii ofall lens surfaces of the optical lens system is Ymin, the axial distancebetween the object-side surface of the first lens element and the imagesurface is TL, a maximum effective radius of an image-side surface ofthe ninth lens element is Y92, and the following conditions aresatisfied:1.0<Ymax/Ymin<5.0; andTL/Y92<3.50.
 11. The optical lens system of claim 1, wherein a maximumeffective radius of an image-side surface of the ninth lens element isY92, an axial distance between the image-side surface of the ninth lenselement and the image surface is BL, a vertical distance between acritical point on an image-side surface of the eighth lens element andthe optical axis is Yc82, a vertical distance between a critical pointon the image-side surface of the ninth lens element and the optical axisis Yc92, and the following conditions are satisfied:2.0<Y92/BL<20; and0.50<Yc92/Yc82<2.0.
 12. An image capturing unit, comprising: the opticallens system of claim 1; and an image sensor disposed on the imagesurface of the optical lens system.
 13. An electronic device, comprisingat least two image capturing units which face in a same direction andcomprise: a first image capturing unit, wherein the first imagecapturing unit is the image capturing unit of claim 12; and a secondimage capturing unit; wherein a maximum field of view of the first imagecapturing unit is different from a maximum field of view of the secondimage capturing unit by at least 20 degrees.
 14. The electronic deviceof claim 13, wherein the maximum field of view of the first imagecapturing unit is different from the maximum field of view of the secondimage capturing unit by at least 60 degrees.
 15. An optical lens systemcomprising, in order from an object side to an image side, a front lensgroup, a middle lens group and a rear lens group; the front lens groupcomprising an object-side lens element closest to an imaged object, therear lens group comprising at least three lens elements, and the atleast three lens elements of the rear lens group comprise an image-sidelens element closest to an image surface; wherein the image-side lenselement has an object-side surface being concave on an optical axis, atleast one lens surface of the rear lens group has at least one criticalpoint in an off-axis region thereof, and each lens element of the rearlens group has at least one lens surface being aspheric; wherein a totalnumber of lens elements of the optical lens system is NL, an axialdistance between an object-side surface of the object-side lens elementand the image surface is TL, a maximum image height of the optical lenssystem is ImgH, an entrance pupil diameter of the optical lens system isEPD, a minimum value among Abbe numbers of all lens elements of theoptical lens system is Vmin, a total number of lens elements having anAbbe number smaller than 40 in the optical lens system is V40, and thefollowing conditions are satisfied:NL=9; TL/ImgH<3.0;TL/EPD<4.0;Vmin<28; and4≤V40.
 16. The optical lens system of claim 15, wherein the front lensgroup has a total of three lens elements, the rear lens group has atotal of three lens elements, a focal length of the optical lens systemis f, a composite focal length of the front lens group is fG1, and thefollowing condition is satisfied:0.25<fG1/f<8.0.
 17. The optical lens system of claim 16, wherein thefocal length of the optical lens system is f, a composite focal lengthof the middle lens group is fG2, a composite focal length of the rearlens group is fG3, and the following conditions are satisfied:−0.75<f/fG2<2.0; and−2.50<f/fG3<0.60.
 18. The optical lens system of claim 15, wherein theaxial distance between the object-side surface of the object-side lenselement and the image surface is TL, the entrance pupil diameter of theoptical lens system is EPD, a maximum effective radius of theobject-side surface of the object-side lens element is Y11, the maximumimage height of the optical lens system is ImgH, and the followingconditions are satisfied:TL/EPD<3.0; and0.2<Y11/ImgH<1.0.
 19. The optical lens system of claim 15, wherein anAbbe number of a lens element of the optical lens system is V, arefractive index of the lens element of the optical lens system is N,and at least one lens element of the optical lens system satisfies thefollowing condition:6.0<V/N<12.0.
 20. The optical lens system of claim 15, wherein theminimum value among Abbe numbers of all lens elements of the opticallens system is Vmin, and the following condition is satisfied:Vmin<24; wherein a focal length of the optical lens system is f, a focallength of the i-th lens element is fi, and at least two lens elements ofthe optical lens system satisfy the following condition:|f/fi|<0.20.
 21. The optical lens system of claim 15, wherein at leastone lens surface of each lens element of the rear lens group has atleast one critical point in an off-axis region thereof.
 22. The opticallens system of claim 15, wherein an axial distance between theobject-side surface of the object-side lens element and an image-sidesurface of the image-side lens element is Td, a sum of centralthicknesses of all lens elements of the optical lens system is ΣCT, andthe following condition is satisfied:Td/ΣCT<1.75.
 23. The optical lens system of claim 15, wherein a totalnumber of inflection points of all lens elements of the optical lenssystem is NIF, and the following condition is satisfied:20≤NIF.
 24. The optical lens system of claim 15, wherein the axialdistance between the object-side surface of the object-side lens elementand the image surface is TL, the maximum image height of the opticallens system is ImgH, a chief ray angle at a maximum image heightposition of the optical lens system is CRA, and the following conditionis satisfied:TL/[ImgH×tan(CRA)]<3.0.
 25. An image capturing unit, comprising: theoptical lens system of claim 15; and an image sensor disposed on theimage surface of the optical lens system.
 26. An electronic device,comprising: the image capturing unit of claim
 25. 27. An optical lenssystem comprising nine lens elements, the nine lens elements being, inorder from an object side to an image side, a first lens element, asecond lens element, a third lens element, a fourth lens element, afifth lens element, a sixth lens element, a seventh lens element, aneighth lens element and a ninth lens element; wherein the ninth lenselement has an object-side surface being concave on an optical axis, atleast one lens surface of the seventh lens element, the eighth lenselement and the ninth lens element has at least one critical point in anoff-axis region thereof, each of the seventh lens element, the eighthlens element and the ninth lens element has at least one lens surfacebeing aspheric, and at least five lens elements of the optical lenssystem are made of plastic material; wherein an axial distance betweenan object-side surface of the first lens element and an image surface isTL, a maximum image height of the optical lens system is ImgH, anentrance pupil diameter of the optical lens system is EPD, a totalnumber of lens elements having an Abbe number smaller than 40 in theoptical lens system is V40, and the following conditions are satisfied:TL/ImgH<3.0TL/EPD<4.0; and4≤V40.
 28. The optical lens system of claim 27, wherein a maximumeffective radius of an image-side surface of the ninth lens element isY92, an axial distance between the image-side surface of the ninth lenselement and the image surface is BL, and the following condition issatisfied:2.0<Y92/BL<20.
 29. The optical lens system of claim 27, wherein a totalnumber of inflection points of all lens elements of the optical lenssystem is NIF, and the following condition is satisfied:20<NIF.
 30. The optical lens system of claim 27, wherein a total numberof lens elements having an Abbe number smaller than 30 in the opticallens system is V30, and the following condition is satisfied:4≤V30.
 31. The optical lens system of claim 27, wherein the axialdistance between the object-side surface of the first lens element andthe image surface is TL, the maximum image height of the optical lenssystem is ImgH, a chief ray angle at a maximum image height position ofthe optical lens system is CRA, and the following condition issatisfied:TL/[ImgH×tan(CRA)]<3.0.
 32. The optical lens system of claim 27, whereina focal length of the optical lens system is f, a curvature radius ofthe object-side surface of the ninth lens element is R17, a curvatureradius of an image-side surface of the ninth lens element is R18, avertical distance between a critical point on an image-side surface ofthe eighth lens element and the optical axis is Yc82, a verticaldistance between a critical point on the image-side surface of the ninthlens element and the optical axis is Yc92, and the following conditionsare satisfied:1.0<|f/R17|+|f/R18|; and0.50<Yc92/Yc82<2.0.
 33. The optical lens system of claim 27, wherein afocal length of the optical lens system is f, a focal length of thefirst lens element is f1, a focal length of the second lens element isf2, a focal length of the third lens element is f3, a focal length ofthe fourth lens element is f4, a focal length of the fifth lens elementis f5, a focal length of the sixth lens element is f6, a focal length ofthe seventh lens element is f7, a focal length of the eighth lenselement is f8, a focal length of the ninth lens element is f9, and thefollowing conditions are satisfied:−1.5<f/f1<4.0;−3.0<f/f2<2.0;−3.0<f/f3<3.0;−3.0<f/f4<3.0;−3.0<f/f5<3.0;−3.0<f/f6<3.0;−3.0<f/f7<3.0;−3.0<f/f8<3.0; and−3.0<f/f9<3.0.